55639456951 has 16 divisors (see below), whose sum is σ = 61641062784. Its totient is φ = 49899757824.

The previous prime is 55639456913. The next prime is 55639456973. The reversal of 55639456951 is 15965493655.

It is a cyclic number.

It is not a de Polignac number, because 55639456951 - 2¹¹ = 55639454903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55639456981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248640 + ... + 416053.

It is an arithmetic number, because the mean of its divisors is an integer number (3852566424).

Almost surely, 2^55639456951 is an apocalyptic number.

55639456951 is a deficient number, since it is larger than the sum of its proper divisors (6001605833).

55639456951 is a wasteful number, since it uses less digits than its factorization.

55639456951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664890.

The product of its digits is 21870000, while the sum is 58.

The spelling of 55639456951 in words is "fifty-five billion, six hundred thirty-nine million, four hundred fifty-six thousand, nine hundred fifty-one".