12657722898 has 16 divisors (see below), whose sum is σ = 26647837920. Its totient is φ = 3997175616.

The previous prime is 12657722867. The next prime is 12657722899. The reversal of 12657722898 is 89822775621.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (12657722899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55516215 + ... + 55516442.

It is an arithmetic number, because the mean of its divisors is an integer number (1665489870).

Almost surely, 2^12657722898 is an apocalyptic number.

12657722898 is an abundant number, since it is smaller than the sum of its proper divisors (13990115022).

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

12657722898 is a wasteful number, since it uses less digits than its factorization.

12657722898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111032681.

The product of its digits is 6773760, while the sum is 57.

The spelling of 12657722898 in words is "twelve billion, six hundred fifty-seven million, seven hundred twenty-two thousand, eight hundred ninety-eight".