72221507858 has 16 divisors (see below), whose sum is σ = 109900644480. Its totient is φ = 35589602256.

The previous prime is 72221507843. The next prime is 72221507887. The reversal of 72221507858 is 85870512227.

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, 322316 + ... + 498327.

It is an arithmetic number, because the mean of its divisors is an integer number (6868790280).

Almost surely, 2^72221507858 is an apocalyptic number.

72221507858 is a deficient number, since it is larger than the sum of its proper divisors (37679136622).

72221507858 is a wasteful number, since it uses less digits than its factorization.

72221507858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821281.

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 72221507858 in words is "seventy-two billion, two hundred twenty-one million, five hundred seven thousand, eight hundred fifty-eight".