72276065725521 has 16 divisors (see below), whose sum is σ = 110182164810624. Its totient is φ = 41282906168064.

The previous prime is 72276065725517. The next prime is 72276065725559. The reversal of 72276065725521 is 12552756067227.

It is not a de Polignac number, because 72276065725521 - 2² = 72276065725517 is a prime.

It is a super-2 number, since 2×72276065725521² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72276065721521) 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, 737567256 + ... + 737665241.

It is an arithmetic number, because the mean of its divisors is an integer number (6886385300664).

Almost surely, 2^{72276065725521} is an apocalyptic number.

It is an amenable number.

72276065725521 is a deficient number, since it is larger than the sum of its proper divisors (37906099085103).

72276065725521 is a wasteful number, since it uses less digits than its factorization.

72276065725521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475234840.

The product of its (nonzero) digits is 24696000, while the sum is 57.

The spelling of 72276065725521 in words is "seventy-two trillion, two hundred seventy-six billion, sixty-five million, seven hundred twenty-five thousand, five hundred twenty-one".