55686968656 has 40 divisors (see below), whose sum is σ = 118057720608. Its totient is φ = 25235760000.

The previous prime is 55686968641. The next prime is 55686968681. The reversal of 55686968656 is 65686968655.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419695 + ... + 536206.

Almost surely, 2^55686968656 is an apocalyptic number.

It is an amenable number.

55686968656 is an abundant number, since it is smaller than the sum of its proper divisors (62370751952).

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

55686968656 is a wasteful number, since it uses less digits than its factorization.

55686968656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956251 (or 956245 counting only the distinct ones).

The product of its digits is 559872000, while the sum is 70.

Subtracting 55686968656 from its reverse (65686968655), we obtain a palindrome (9999999999).

The spelling of 55686968656 in words is "fifty-five billion, six hundred eighty-six million, nine hundred sixty-eight thousand, six hundred fifty-six".