72900111778 has 16 divisors (see below), whose sum is σ = 117843163200. Its totient is φ = 33622935696.

The previous prime is 72900111743. The next prime is 72900111799. The reversal of 72900111778 is 87711100927.

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, 931228 + ... + 1006471.

It is an arithmetic number, because the mean of its divisors is an integer number (7365197700).

Almost surely, 2^72900111778 is an apocalyptic number.

72900111778 is a deficient number, since it is larger than the sum of its proper divisors (44943051422).

72900111778 is a wasteful number, since it uses less digits than its factorization.

72900111778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939161.

The product of its (nonzero) digits is 49392, while the sum is 43.

The spelling of 72900111778 in words is "seventy-two billion, nine hundred million, one hundred eleven thousand, seven hundred seventy-eight".