556636636654 has 64 divisors (see below), whose sum is σ = 1002195597312. Its totient is φ = 226705564800.

The previous prime is 556636636637. The next prime is 556636636657. The reversal of 556636636654 is 456636636655.

It is a junction number, because it is equal to n+sod(n) for n = 556636636592 and 556636636601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556636636657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68826999 + ... + 68835085.

It is an arithmetic number, because the mean of its divisors is an integer number (15659306208).

Almost surely, 2^556636636654 is an apocalyptic number.

556636636654 is a deficient number, since it is larger than the sum of its proper divisors (445558960658).

556636636654 is a wasteful number, since it uses less digits than its factorization.

556636636654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481.

The product of its digits is 209952000, while the sum is 61.

Subtracting from 556636636654 its reverse (456636636655), we obtain a palindrome (99999999999).

The spelling of 556636636654 in words is "five hundred fifty-six billion, six hundred thirty-six million, six hundred thirty-six thousand, six hundred fifty-four".