72249704155 has 16 divisors (see below), whose sum is σ = 90478828800. Its totient is φ = 55280842848.

The previous prime is 72249704123. The next prime is 72249704173. The reversal of 72249704155 is 55140794227.

It is a cyclic number.

It is not a de Polignac number, because 72249704155 - 2⁵ = 72249704123 is a prime.

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, 1271584 + ... + 1327186.

It is an arithmetic number, because the mean of its divisors is an integer number (5654926800).

Almost surely, 2^72249704155 is an apocalyptic number.

72249704155 is a deficient number, since it is larger than the sum of its proper divisors (18229124645).

72249704155 is a wasteful number, since it uses less digits than its factorization.

72249704155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66930.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 72249704155 in words is "seventy-two billion, two hundred forty-nine million, seven hundred four thousand, one hundred fifty-five".