31450670880 has 96 divisors (see below), whose sum is σ = 99139723200. Its totient is φ = 8380910592.

The previous prime is 31450670851. The next prime is 31450670887. The reversal of 31450670880 is 8807605413.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (31450670887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677866 + ... + 722774.

It is an arithmetic number, because the mean of its divisors is an integer number (1032705450).

Almost surely, 2^31450670880 is an apocalyptic number.

31450670880 is a gapful number since it is divisible by the number (30) 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 31450670880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49569861600).

31450670880 is an abundant number, since it is smaller than the sum of its proper divisors (67689052320).

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

31450670880 is a wasteful number, since it uses less digits than its factorization.

31450670880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46386 (or 46378 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 31450670880 in words is "thirty-one billion, four hundred fifty million, six hundred seventy thousand, eight hundred eighty".