31693487180472 has 240 divisors, whose sum is σ = 96156215148840. Its totient is φ = 9695396051712.

The previous prime is 31693487180471. The next prime is 31693487180489. The reversal of 31693487180472 is 27408178439613.

31693487180472 is a `hidden beast` number, since 3 + 1 + 6 + 9 + 3 + 4 + 87 + 1 + 80 + 472 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31693487180471) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 252059043 + ... + 252184749.

Almost surely, 2^{31693487180472} 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 31693487180472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48078107574420).

31693487180472 is an abundant number, since it is smaller than the sum of its proper divisors (64462727968368).

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

31693487180472 is a wasteful number, since it uses less digits than its factorization.

31693487180472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126084 (or 125898 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 31693487180472 in words is "thirty-one trillion, six hundred ninety-three billion, four hundred eighty-seven million, one hundred eighty thousand, four hundred seventy-two".