72656894979 has 24 divisors (see below), whose sum is σ = 108171764064. Its totient is φ = 46972800000.

The previous prime is 72656894977. The next prime is 72656894993. The reversal of 72656894979 is 97949865627.

72656894979 is a `hidden beast` number, since 7 + 2 + 6 + 56 + 89 + 497 + 9 = 666.

It is not a de Polignac number, because 72656894979 - 2¹ = 72656894977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72656894971) 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, 893022 + ... + 970979.

It is an arithmetic number, because the mean of its divisors is an integer number (4507156836).

Almost surely, 2^72656894979 is an apocalyptic number.

72656894979 is a deficient number, since it is larger than the sum of its proper divisors (35514869085).

72656894979 is a wasteful number, since it uses less digits than its factorization.

72656894979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864139 (or 1864136 counting only the distinct ones).

The product of its digits is 411505920, while the sum is 72.

The spelling of 72656894979 in words is "seventy-two billion, six hundred fifty-six million, eight hundred ninety-four thousand, nine hundred seventy-nine".