8161772632832 has 288 divisors, whose sum is σ = 20679890380800. Its totient is φ = 3128343773184.

The previous prime is 8161772632829. The next prime is 8161772632877. The reversal of 8161772632832 is 2382362771618.

It is a super-2 number, since 2×8161772632832² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205986719 + ... + 206026337.

Almost surely, 2^{8161772632832} 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 8161772632832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10339945190400).

8161772632832 is an abundant number, since it is smaller than the sum of its proper divisors (12518117747968).

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

8161772632832 is a wasteful number, since it uses less digits than its factorization.

8161772632832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39931 (or 39917 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 56.

The spelling of 8161772632832 in words is "eight trillion, one hundred sixty-one billion, seven hundred seventy-two million, six hundred thirty-two thousand, eight hundred thirty-two".