72131700234 has 32 divisors (see below), whose sum is σ = 158678919360. Its totient is φ = 21858088560.

The previous prime is 72131700233. The next prime is 72131700253. The reversal of 72131700234 is 43200713127.

It is not an unprimeable number, because it can be changed into a prime (72131700233) 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, 4508149 + ... + 4524120.

It is an arithmetic number, because the mean of its divisors is an integer number (4958716230).

Almost surely, 2^72131700234 is an apocalyptic number.

72131700234 is an abundant number, since it is smaller than the sum of its proper divisors (86547219126).

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

72131700234 is a wasteful number, since it uses less digits than its factorization.

72131700234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032307 (or 9032285 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The spelling of 72131700234 in words is "seventy-two billion, one hundred thirty-one million, seven hundred thousand, two hundred thirty-four".