72561671507226 has 64 divisors (see below), whose sum is σ = 159317322788736. Its totient is φ = 21849623347200.

The previous prime is 72561671507197. The next prime is 72561671507233. The reversal of 72561671507226 is 62270517616527.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7989220 + ... + 14455136.

It is an arithmetic number, because the mean of its divisors is an integer number (2489333168574).

Almost surely, 2^{72561671507226} is an apocalyptic number.

72561671507226 is an abundant number, since it is smaller than the sum of its proper divisors (86755651281510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72561671507226 is a wasteful number, since it uses less digits than its factorization.

72561671507226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467007.

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 72561671507226 in words is "seventy-two trillion, five hundred sixty-one billion, six hundred seventy-one million, five hundred seven thousand, two hundred twenty-six".