72206051651155 has 32 divisors (see below), whose sum is σ = 87262638363648. Its totient is φ = 57356068473600.

The previous prime is 72206051651137. The next prime is 72206051651159. The reversal of 72206051651155 is 55115615060227.

It is not a de Polignac number, because 72206051651155 - 2²⁷ = 72205917433427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72206051651159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1227317590 + ... + 1227376420.

It is an arithmetic number, because the mean of its divisors is an integer number (2726957448864).

Almost surely, 2^{72206051651155} is an apocalyptic number.

72206051651155 is a deficient number, since it is larger than the sum of its proper divisors (15056586712493).

72206051651155 is a wasteful number, since it uses less digits than its factorization.

72206051651155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61947.

The product of its (nonzero) digits is 630000, while the sum is 46.

The spelling of 72206051651155 in words is "seventy-two trillion, two hundred six billion, fifty-one million, six hundred fifty-one thousand, one hundred fifty-five".