55638477432660 has 48 divisors (see below), whose sum is σ = 155882903694336. Its totient is φ = 14827863802752.

The previous prime is 55638477432617. The next prime is 55638477432661. The reversal of 55638477432660 is 6623477483655.

It is a super-2 number, since 2×55638477432660² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55638477432591 and 55638477432600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55638477432661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283135732 + ... + 283332171.

It is an arithmetic number, because the mean of its divisors is an integer number (3247560493632).

Almost surely, 2^{55638477432660} is an apocalyptic number.

It is an amenable number.

55638477432660 is an abundant number, since it is smaller than the sum of its proper divisors (100244426261676).

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

55638477432660 is a wasteful number, since it uses less digits than its factorization.

55638477432660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566469552 (or 566469550 counting only the distinct ones).

The product of its (nonzero) digits is 609638400, while the sum is 66.

The spelling of 55638477432660 in words is "fifty-five trillion, six hundred thirty-eight billion, four hundred seventy-seven million, four hundred thirty-two thousand, six hundred sixty".