79946457128 has 16 divisors (see below), whose sum is σ = 149919132480. Its totient is φ = 39968021808.

The previous prime is 79946457121. The next prime is 79946457139. The reversal of 79946457128 is 82175464997.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79946457121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585200 + ... + 708767.

It is an arithmetic number, because the mean of its divisors is an integer number (9369945780).

Almost surely, 2^79946457128 is an apocalyptic number.

It is an amenable number.

79946457128 is a deficient number, since it is larger than the sum of its proper divisors (69972675352).

79946457128 is a wasteful number, since it uses less digits than its factorization.

79946457128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301696 (or 1301692 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 62.

The spelling of 79946457128 in words is "seventy-nine billion, nine hundred forty-six million, four hundred fifty-seven thousand, one hundred twenty-eight".