31873894464 has 168 divisors, whose sum is σ = 87640082784. Its totient is φ = 10223155200.

The previous prime is 31873894463. The next prime is 31873894483. The reversal of 31873894464 is 46449837813.

Its product of digits (13934592) is a multiple of the sum of its prime divisors (1024).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31873894463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41883844 + ... + 41884604.

Almost surely, 2^31873894464 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 31873894464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43820041392).

31873894464 is an abundant number, since it is smaller than the sum of its proper divisors (55766188320).

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

31873894464 is a wasteful number, since it uses less digits than its factorization.

31873894464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1024 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 57.

The spelling of 31873894464 in words is "thirty-one billion, eight hundred seventy-three million, eight hundred ninety-four thousand, four hundred sixty-four".