13557656656 has 10 divisors (see below), whose sum is σ = 26267959802. Its totient is φ = 6778828320.

The previous prime is 13557656641. The next prime is 13557656743. The reversal of 13557656656 is 65665675531.

It can be written as a sum of positive squares in only one way, i.e., 13041640000 + 516016656 = 114200^2 + 22716^2 .

It is a super-2 number, since 2×13557656656² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13557656597 and 13557656606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423676755 + ... + 423676786.

Almost surely, 2^13557656656 is an apocalyptic number.

13557656656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13557656656 is a deficient number, since it is larger than the sum of its proper divisors (12710303146).

13557656656 is an equidigital number, since it uses as much as digits as its factorization.

13557656656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847353549 (or 847353543 counting only the distinct ones).

The product of its digits is 17010000, while the sum is 55.

The spelling of 13557656656 in words is "thirteen billion, five hundred fifty-seven million, six hundred fifty-six thousand, six hundred fifty-six".