788542561 has 3 divisors (see below), whose sum is σ = 788570643. Its totient is φ = 788514480.

The previous prime is 788542523. The next prime is 788542571. The reversal of 788542561 is 165245887.

The square root of 788542561 is 28081.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 165245887 = 103 ⋅1604329.

It can be written as a sum of positive squares in only one way, i.e., 195132961 + 593409600 = 13969^2 + 24360^2 .

It is not a de Polignac number, because 788542561 - 2²¹ = 786445409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (788542571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14041 + ... + 42121.

It is an arithmetic number, because the mean of its divisors is an integer number (262856881).

Almost surely, 2^788542561 is an apocalyptic number.

788542561 is the 28081-st square number.

788542561 is the 14041-st centered octagonal number.

It is an amenable number.

788542561 is a deficient number, since it is larger than the sum of its proper divisors (28082).

788542561 is an frugal number, since it uses more digits than its factorization.

788542561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56162 (or 28081 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The cubic root of 788542561 is about 923.8647132534.

The spelling of 788542561 in words is "seven hundred eighty-eight million, five hundred forty-two thousand, five hundred sixty-one".