12615749928 has 48 divisors (see below), whose sum is σ = 34174595520. Its totient is φ = 4204395936.

The previous prime is 12615749899. The next prime is 12615749959. The reversal of 12615749928 is 82994751621.

It is a happy number.

12615749928 is a `hidden beast` number, since 1 + 2 + 61 + 574 + 9 + 9 + 2 + 8 = 666.

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, 410175 + ... + 439857.

It is an arithmetic number, because the mean of its divisors is an integer number (711970740).

Almost surely, 2^12615749928 is an apocalyptic number.

12615749928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12615749928 is an abundant number, since it is smaller than the sum of its proper divisors (21558845592).

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

12615749928 is a wasteful number, since it uses less digits than its factorization.

12615749928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35598 (or 35591 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 12615749928 in words is "twelve billion, six hundred fifteen million, seven hundred forty-nine thousand, nine hundred twenty-eight".