72996640426 has 16 divisors (see below), whose sum is σ = 109869908544. Its totient is φ = 36373452064.

The previous prime is 72996640369. The next prime is 72996640439. The reversal of 72996640426 is 62404669927.

It is a super-2 number, since 2×72996640426² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300131 + ... + 1355113.

It is an arithmetic number, because the mean of its divisors is an integer number (6866869284).

Almost surely, 2^72996640426 is an apocalyptic number.

72996640426 is a deficient number, since it is larger than the sum of its proper divisors (36873268118).

72996640426 is a wasteful number, since it uses less digits than its factorization.

72996640426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57245.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 72996640426 in words is "seventy-two billion, nine hundred ninety-six million, six hundred forty thousand, four hundred twenty-six".