78597734907 has 24 divisors (see below), whose sum is σ = 112642696656. Its totient is φ = 48580021248.

The previous prime is 78597734903. The next prime is 78597734927. The reversal of 78597734907 is 70943779587.

It is not a de Polignac number, because 78597734907 - 2² = 78597734903 is a prime.

It is a super-2 number, since 2×78597734907² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78597734903) 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, 57283 + ... + 400595.

It is an arithmetic number, because the mean of its divisors is an integer number (4693445694).

Almost surely, 2^78597734907 is an apocalyptic number.

78597734907 is a deficient number, since it is larger than the sum of its proper divisors (34044961749).

78597734907 is a wasteful number, since it uses less digits than its factorization.

78597734907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343467 (or 343400 counting only the distinct ones).

The product of its (nonzero) digits is 93350880, while the sum is 66.

The spelling of 78597734907 in words is "seventy-eight billion, five hundred ninety-seven million, seven hundred thirty-four thousand, nine hundred seven".