55638477432681 has 128 divisors (see below), whose sum is σ = 89051772321792. Its totient is φ = 30454479360000.

The previous prime is 55638477432667. The next prime is 55638477432719. The reversal of 55638477432681 is 18623477483655.

It is not a de Polignac number, because 55638477432681 - 2⁶ = 55638477432617 is a prime.

It is a super-2 number, since 2×55638477432681² (a number of 28 digits) contains 22 as substring.

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 127 ways as a sum of consecutive naturals, for example, 3851206000 + ... + 3851220446.

It is an arithmetic number, because the mean of its divisors is an integer number (695716971264).

Almost surely, 2^{55638477432681} is an apocalyptic number.

It is an amenable number.

55638477432681 is a deficient number, since it is larger than the sum of its proper divisors (33413294889111).

55638477432681 is a wasteful number, since it uses less digits than its factorization.

55638477432681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15303.

The product of its digits is 812851200, while the sum is 69.

The spelling of 55638477432681 in words is "fifty-five trillion, six hundred thirty-eight billion, four hundred seventy-seven million, four hundred thirty-two thousand, six hundred eighty-one".