612846561 has 4 divisors (see below), whose sum is σ = 817128752. Its totient is φ = 408564372.

The previous prime is 612846551. The next prime is 612846581. The reversal of 612846561 is 165648216.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 612846561 - 2⁷ = 612846433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612846541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102141091 + ... + 102141096.

It is an arithmetic number, because the mean of its divisors is an integer number (204282188).

Almost surely, 2^612846561 is an apocalyptic number.

It is an amenable number.

612846561 is a deficient number, since it is larger than the sum of its proper divisors (204282191).

612846561 is a wasteful number, since it uses less digits than its factorization.

612846561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204282190.

The product of its digits is 69120, while the sum is 39.

The square root of 612846561 is about 24755.7379409300. The cubic root of 612846561 is about 849.4097683291.

The spelling of 612846561 in words is "six hundred twelve million, eight hundred forty-six thousand, five hundred sixty-one".