72645571540516 has 96 divisors (see below), whose sum is σ = 145822070136960. Its totient is φ = 31369847629824.

The previous prime is 72645571540489. The next prime is 72645571540517. The reversal of 72645571540516 is 61504517554627.

It is not an unprimeable number, because it can be changed into a prime (72645571540517) 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, 104475550 + ... + 105168586.

It is an arithmetic number, because the mean of its divisors is an integer number (1518979897260).

Almost surely, 2^{72645571540516} is an apocalyptic number.

It is an amenable number.

72645571540516 is an abundant number, since it is smaller than the sum of its proper divisors (73176498596444).

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

72645571540516 is a wasteful number, since it uses less digits than its factorization.

72645571540516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693773 (or 693771 counting only the distinct ones).

The product of its (nonzero) digits is 35280000, while the sum is 58.

The spelling of 72645571540516 in words is "seventy-two trillion, six hundred forty-five billion, five hundred seventy-one million, five hundred forty thousand, five hundred sixteen".