31878421488 has 60 divisors (see below), whose sum is σ = 94463270928. Its totient is φ = 10001072640.

The previous prime is 31878421469. The next prime is 31878421507. The reversal of 31878421488 is 88412487813.

31878421488 is a `hidden beast` number, since 3 + 1 + 87 + 84 + 2 + 1 + 488 = 666.

It is an interprime number because it is at equal distance from previous prime (31878421469) and next prime (31878421507).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6508668 + ... + 6513563.

Almost surely, 2^31878421488 is an apocalyptic number.

It is an amenable number.

31878421488 is an abundant number, since it is smaller than the sum of its proper divisors (62584849440).

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

31878421488 is a wasteful number, since it uses less digits than its factorization.

31878421488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13022262 (or 13022253 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 54.

The spelling of 31878421488 in words is "thirty-one billion, eight hundred seventy-eight million, four hundred twenty-one thousand, four hundred eighty-eight".