12631185840 has 320 divisors, whose sum is σ = 48438899712. Its totient is φ = 2651443200.

The previous prime is 12631185829. The next prime is 12631185863. The reversal of 12631185840 is 4858113621.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4606870 + ... + 4609610.

Almost surely, 2^12631185840 is an apocalyptic number.

12631185840 is a gapful number since it is divisible by the number (10) 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 12631185840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24219449856).

12631185840 is an abundant number, since it is smaller than the sum of its proper divisors (35807713872).

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

12631185840 is a wasteful number, since it uses less digits than its factorization.

12631185840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988 (or 2982 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 12631185840 in words is "twelve billion, six hundred thirty-one million, one hundred eighty-five thousand, eight hundred forty".