83172738831 has 16 divisors (see below), whose sum is σ = 136488597504. Its totient is φ = 43871334624.

The previous prime is 83172738821. The next prime is 83172738877. The reversal of 83172738831 is 13883727138.

It is not a de Polignac number, because 83172738831 - 2²³ = 83164350223 is a prime.

It is a super-2 number, since 2×83172738831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83172738821) 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, 152330751 + ... + 152331296.

It is an arithmetic number, because the mean of its divisors is an integer number (8530537344).

Almost surely, 2^83172738831 is an apocalyptic number.

83172738831 is a deficient number, since it is larger than the sum of its proper divisors (53315858673).

83172738831 is a wasteful number, since it uses less digits than its factorization.

83172738831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304662070.

The product of its digits is 1354752, while the sum is 51.

The spelling of 83172738831 in words is "eighty-three billion, one hundred seventy-two million, seven hundred thirty-eight thousand, eight hundred thirty-one".