79446698640 has 100 divisors (see below), whose sum is σ = 275930176764. Its totient is φ = 21185784576.

The previous prime is 79446698633. The next prime is 79446698641. The reversal of 79446698640 is 4689664497.

79446698640 is a `hidden beast` number, since 7 + 94 + 466 + 9 + 86 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 57415827456 + 22030871184 = 239616^2 + 148428^2 .

It is a super-3 number, since 3×79446698640³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (79446698641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6123667 + ... + 6136626.

Almost surely, 2^79446698640 is an apocalyptic number.

It is an amenable number.

79446698640 is an abundant number, since it is smaller than the sum of its proper divisors (196483478124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79446698640 is a wasteful number, since it uses less digits than its factorization.

79446698640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12260318 (or 12260303 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 79446698640 in words is "seventy-nine billion, four hundred forty-six million, six hundred ninety-eight thousand, six hundred forty".