12538791630 has 64 divisors (see below), whose sum is σ = 33459091200. Its totient is φ = 3341446560.

The previous prime is 12538791563. The next prime is 12538791631. The reversal of 12538791630 is 3619783521.

12538791630 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 8 + 7 + 9 + 1 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538791631) 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, 411625 + ... + 441035.

It is an arithmetic number, because the mean of its divisors is an integer number (522798300).

Almost surely, 2^12538791630 is an apocalyptic number.

12538791630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12538791630 is an abundant number, since it is smaller than the sum of its proper divisors (20920299570).

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

12538791630 is a wasteful number, since it uses less digits than its factorization.

12538791630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31006 (or 31000 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 12538791630 in words is "twelve billion, five hundred thirty-eight million, seven hundred ninety-one thousand, six hundred thirty".