73231611992 has 128 divisors (see below), whose sum is σ = 184392806400. Its totient is φ = 26401334400.

The previous prime is 73231611979. The next prime is 73231611997. The reversal of 73231611992 is 29911613237.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73231611997) 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, 430517 + ... + 576027.

It is an arithmetic number, because the mean of its divisors is an integer number (1440568800).

Almost surely, 2^73231611992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73231611992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92196403200).

73231611992 is an abundant number, since it is smaller than the sum of its proper divisors (111161194408).

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

73231611992 is a wasteful number, since it uses less digits than its factorization.

73231611992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145597 (or 145593 counting only the distinct ones).

The product of its digits is 122472, while the sum is 44.

The spelling of 73231611992 in words is "seventy-three billion, two hundred thirty-one million, six hundred eleven thousand, nine hundred ninety-two".