31318788144 has 80 divisors (see below), whose sum is σ = 93504015360. Its totient is φ = 8847674880.

The previous prime is 31318788107. The next prime is 31318788157. The reversal of 31318788144 is 44188781313.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31318788093 and 31318788102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493752 + ... + 553559.

It is an arithmetic number, because the mean of its divisors is an integer number (1168800192).

Almost surely, 2^31318788144 is an apocalyptic number.

It is an amenable number.

31318788144 is an abundant number, since it is smaller than the sum of its proper divisors (62185227216).

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

31318788144 is a wasteful number, since it uses less digits than its factorization.

31318788144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047418 (or 1047412 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The spelling of 31318788144 in words is "thirty-one billion, three hundred eighteen million, seven hundred eighty-eight thousand, one hundred forty-four".