31145552680 has 128 divisors (see below), whose sum is σ = 77476953600. Its totient is φ = 11174195200.

The previous prime is 31145552671. The next prime is 31145552681. The reversal of 31145552680 is 8625554113.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (31145552681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11881770 + ... + 11884390.

It is an arithmetic number, because the mean of its divisors is an integer number (605288700).

Almost surely, 2^31145552680 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 31145552680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38738476800).

31145552680 is an abundant number, since it is smaller than the sum of its proper divisors (46331400920).

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

31145552680 is a wasteful number, since it uses less digits than its factorization.

31145552680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 31145552680 in words is "thirty-one billion, one hundred forty-five million, five hundred fifty-two thousand, six hundred eighty".