72156051727 has 16 divisors (see below), whose sum is σ = 80484364800. Its totient is φ = 64287077760.

The previous prime is 72156051707. The next prime is 72156051731. The reversal of 72156051727 is 72715065127.

It is a cyclic number.

It is not a de Polignac number, because 72156051727 - 2²⁷ = 72021833999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72156051707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330474 + ... + 503512.

It is an arithmetic number, because the mean of its divisors is an integer number (5030272800).

Almost surely, 2^72156051727 is an apocalyptic number.

72156051727 is a deficient number, since it is larger than the sum of its proper divisors (8328313073).

72156051727 is a wasteful number, since it uses less digits than its factorization.

72156051727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174366.

The product of its (nonzero) digits is 205800, while the sum is 43.

The spelling of 72156051727 in words is "seventy-two billion, one hundred fifty-six million, fifty-one thousand, seven hundred twenty-seven".