72531030450377 has 12 divisors (see below), whose sum is σ = 76883646900420. Its totient is φ = 68413548294432.

The previous prime is 72531030450353. The next prime is 72531030450383. The reversal of 72531030450377 is 77305403013527.

It can be written as a sum of positive squares in 2 ways, for example, as 63598248472201 + 8932781978176 = 7974851^2 + 2988776^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72531030450377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72531030450577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438600698 + ... + 438766035.

It is an arithmetic number, because the mean of its divisors is an integer number (6406970575035).

Almost surely, 2^{72531030450377} is an apocalyptic number.

It is an amenable number.

72531030450377 is a deficient number, since it is larger than the sum of its proper divisors (4352616450043).

72531030450377 is a wasteful number, since it uses less digits than its factorization.

72531030450377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877367000 (or 877366981 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 47.

The spelling of 72531030450377 in words is "seventy-two trillion, five hundred thirty-one billion, thirty million, four hundred fifty thousand, three hundred seventy-seven".