73551531972 has 24 divisors (see below), whose sum is σ = 172612270656. Its totient is φ = 24375458848.

The previous prime is 73551531961. The next prime is 73551532051. The reversal of 73551531972 is 27913515537.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17712648 + ... + 17716799.

It is an arithmetic number, because the mean of its divisors is an integer number (7192177944).

Almost surely, 2^73551531972 is an apocalyptic number.

It is an amenable number.

73551531972 is an abundant number, since it is smaller than the sum of its proper divisors (99060738684).

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

73551531972 is a wasteful number, since it uses less digits than its factorization.

73551531972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35429627 (or 35429625 counting only the distinct ones).

The product of its digits is 992250, while the sum is 48.

The spelling of 73551531972 in words is "seventy-three billion, five hundred fifty-one million, five hundred thirty-one thousand, nine hundred seventy-two".