31815855141696 has 448 divisors, whose sum is σ = 99976867660800. Its totient is φ = 9886599217152.

The previous prime is 31815855141691. The next prime is 31815855141703. The reversal of 31815855141696 is 69614155851813.

31815855141696 is a `hidden beast` number, since 3 + 1 + 8 + 1 + 5 + 85 + 51 + 416 + 96 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31815855141691) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8441456100 + ... + 8441459868.

Almost surely, 2^{31815855141696} is an apocalyptic number.

31815855141696 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 31815855141696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49988433830400).

31815855141696 is an abundant number, since it is smaller than the sum of its proper divisors (68161012519104).

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

31815855141696 is a wasteful number, since it uses less digits than its factorization.

31815855141696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463 (or 6447 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 63.

The spelling of 31815855141696 in words is "thirty-one trillion, eight hundred fifteen billion, eight hundred fifty-five million, one hundred forty-one thousand, six hundred ninety-six".