72997152426 has 64 divisors (see below), whose sum is σ = 177000422400. Its totient is φ = 22115646000.

The previous prime is 72997152341. The next prime is 72997152463. The reversal of 72997152426 is 62425179927.

72997152426 is a `hidden beast` number, since 7 + 2 + 9 + 97 + 1 + 524 + 26 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3643705 + ... + 3663683.

It is an arithmetic number, because the mean of its divisors is an integer number (2765631600).

Almost surely, 2^72997152426 is an apocalyptic number.

72997152426 is an abundant number, since it is smaller than the sum of its proper divisors (104003269974).

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

72997152426 is a wasteful number, since it uses less digits than its factorization.

72997152426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26152 (or 26146 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The spelling of 72997152426 in words is "seventy-two billion, nine hundred ninety-seven million, one hundred fifty-two thousand, four hundred twenty-six".