72819155645 has 16 divisors (see below), whose sum is σ = 88040639232. Its totient is φ = 57818501760.

The previous prime is 72819155593. The next prime is 72819155659. The reversal of 72819155645 is 54655191827.

It is not a de Polignac number, because 72819155645 - 2⁶ = 72819155581 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 261824 + ... + 462806.

It is an arithmetic number, because the mean of its divisors is an integer number (5502539952).

Almost surely, 2^72819155645 is an apocalyptic number.

It is an amenable number.

72819155645 is a deficient number, since it is larger than the sum of its proper divisors (15221483587).

72819155645 is a wasteful number, since it uses less digits than its factorization.

72819155645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201532.

The product of its digits is 3024000, while the sum is 53.

The spelling of 72819155645 in words is "seventy-two billion, eight hundred nineteen million, one hundred fifty-five thousand, six hundred forty-five".