55639293656 has 8 divisors (see below), whose sum is σ = 104323675620. Its totient is φ = 27819646824.

The previous prime is 55639293653. The next prime is 55639293691. The reversal of 55639293656 is 65639293655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 55639293595 and 55639293604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55639293653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3477455846 + ... + 3477455861.

Almost surely, 2^55639293656 is an apocalyptic number.

It is an amenable number.

55639293656 is a deficient number, since it is larger than the sum of its proper divisors (48684381964).

55639293656 is a wasteful number, since it uses less digits than its factorization.

55639293656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954911713 (or 6954911709 counting only the distinct ones).

The product of its digits is 39366000, while the sum is 59.

Subtracting 55639293656 from its reverse (65639293655), we obtain a palindrome (9999999999).

The spelling of 55639293656 in words is "fifty-five billion, six hundred thirty-nine million, two hundred ninety-three thousand, six hundred fifty-six".