72479790978 has 32 divisors (see below), whose sum is σ = 168793911936. Its totient is φ = 20317784448.

The previous prime is 72479790967. The next prime is 72479790997. The reversal of 72479790978 is 87909797427.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16278051 + ... + 16282502.

It is an arithmetic number, because the mean of its divisors is an integer number (5274809748).

Almost surely, 2^72479790978 is an apocalyptic number.

72479790978 is an abundant number, since it is smaller than the sum of its proper divisors (96314120958).

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

72479790978 is a wasteful number, since it uses less digits than its factorization.

72479790978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32560618.

The product of its (nonzero) digits is 112021056, while the sum is 69.

The spelling of 72479790978 in words is "seventy-two billion, four hundred seventy-nine million, seven hundred ninety thousand, nine hundred seventy-eight".