12899479356 has 72 divisors (see below), whose sum is σ = 33389900544. Its totient is φ = 4196737440.

The previous prime is 12899479319. The next prime is 12899479361. The reversal of 12899479356 is 65397499821.

12899479356 is a `hidden beast` number, since 1 + 28 + 99 + 479 + 3 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12899479293 and 12899479302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3135741 + ... + 3139851.

Almost surely, 2^12899479356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12899479356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16694950272).

12899479356 is an abundant number, since it is smaller than the sum of its proper divisors (20490421188).

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

12899479356 is a wasteful number, since it uses less digits than its factorization.

12899479356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6191 (or 6186 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 12899479356 in words is "twelve billion, eight hundred ninety-nine million, four hundred seventy-nine thousand, three hundred fifty-six".