15631381404 has 48 divisors (see below), whose sum is σ = 40619518240. Its totient is φ = 5198411520.

The previous prime is 15631381399. The next prime is 15631381477. The reversal of 15631381404 is 40418313651.

15631381404 is a `hidden beast` number, since 1 + 5 + 631 + 3 + 8 + 14 + 0 + 4 = 666.

It is a super-2 number, since 2×15631381404² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120367 + ... + 213894.

Almost surely, 2^15631381404 is an apocalyptic number.

It is an amenable number.

15631381404 is an abundant number, since it is smaller than the sum of its proper divisors (24988136836).

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

15631381404 is a wasteful number, since it uses less digits than its factorization.

15631381404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334707 (or 334699 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 15631381404 in words is "fifteen billion, six hundred thirty-one million, three hundred eighty-one thousand, four hundred four".