78192757089 has 24 divisors (see below), whose sum is σ = 113409675392. Its totient is φ = 51914247840.

The previous prime is 78192757063. The next prime is 78192757103. The reversal of 78192757089 is 98075729187.

It is not a de Polignac number, because 78192757089 - 2⁸ = 78192756833 is a prime.

It is a super-2 number, since 2×78192757089² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78192750089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7475187 + ... + 7485639.

Almost surely, 2^78192757089 is an apocalyptic number.

It is an amenable number.

78192757089 is a deficient number, since it is larger than the sum of its proper divisors (35216918303).

78192757089 is a wasteful number, since it uses less digits than its factorization.

78192757089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13797 (or 13794 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 63.

The spelling of 78192757089 in words is "seventy-eight billion, one hundred ninety-two million, seven hundred fifty-seven thousand, eighty-nine".