79597657906 has 32 divisors (see below), whose sum is σ = 131494512240. Its totient is φ = 35910061824.

The previous prime is 79597657903. The next prime is 79597657913. The reversal of 79597657906 is 60975679597.

It can be written as a sum of positive squares in 8 ways, for example, as 519156225 + 79078501681 = 22785^2 + 281209^2 .

It is not an unprimeable number, because it can be changed into a prime (79597657903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263316 + ... + 478048.

Almost surely, 2^79597657906 is an apocalyptic number.

79597657906 is a deficient number, since it is larger than the sum of its proper divisors (51896854334).

79597657906 is a wasteful number, since it uses less digits than its factorization.

79597657906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215070.

The product of its (nonzero) digits is 225042300, while the sum is 70.

The spelling of 79597657906 in words is "seventy-nine billion, five hundred ninety-seven million, six hundred fifty-seven thousand, nine hundred six".