31643155050156 has 144 divisors (see below), whose sum is σ = 88317261264960. Its totient is φ = 9490638274560.

The previous prime is 31643155050113. The next prime is 31643155050281. The reversal of 31643155050156 is 65105055134613.

31643155050156 is a `hidden beast` number, since 3 + 1 + 6 + 4 + 31 + 550 + 50 + 15 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21408625 + ... + 22838903.

It is an arithmetic number, because the mean of its divisors is an integer number (613314314340).

Almost surely, 2^{31643155050156} is an apocalyptic number.

31643155050156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31643155050156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44158630632480).

31643155050156 is an abundant number, since it is smaller than the sum of its proper divisors (56674106214804).

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

31643155050156 is a wasteful number, since it uses less digits than its factorization.

31643155050156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431496 (or 1431491 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 31643155050156 in words is "thirty-one trillion, six hundred forty-three billion, one hundred fifty-five million, fifty thousand, one hundred fifty-six".