78299792041 has 9 divisors (see below), whose sum is σ = 81101293221. Its totient is φ = 75591964224.

The previous prime is 78299792027. The next prime is 78299792069. The reversal of 78299792041 is 14029799287.

The square root of 78299792041 is 279821.

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

It can be written as a sum of positive squares in 4 ways, for example, as 13509180441 + 64790611600 = 116229^2 + 254540^2 .

It is not a de Polignac number, because 78299792041 - 2¹⁷ = 78299660969 is a prime.

It is a super-2 number, since 2×78299792041² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78299792141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8109985 + ... + 8119633.

Almost surely, 2^78299792041 is an apocalyptic number.

78299792041 is the 279821-st square number.

78299792041 is the 139911-st centered octagonal number.

It is an amenable number.

78299792041 is a deficient number, since it is larger than the sum of its proper divisors (2801501180).

78299792041 is an frugal number, since it uses more digits than its factorization.

78299792041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19356 (or 9678 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 78299792041 in words is "seventy-eight billion, two hundred ninety-nine million, seven hundred ninety-two thousand, forty-one".