55638477432658 has 4 divisors (see below), whose sum is σ = 83457716148990. Its totient is φ = 27819238716328.

The previous prime is 55638477432617. The next prime is 55638477432661. The reversal of 55638477432658 is 85623477483655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54227126304649 + 1411351128009 = 7363907^2 + 1188003^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13909619358163 + ... + 13909619358166.

Almost surely, 2^{55638477432658} is an apocalyptic number.

55638477432658 is a deficient number, since it is larger than the sum of its proper divisors (27819238716332).

55638477432658 is a wasteful number, since it uses less digits than its factorization.

55638477432658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27819238716331.

The product of its digits is 4064256000, while the sum is 73.

The spelling of 55638477432658 in words is "fifty-five trillion, six hundred thirty-eight billion, four hundred seventy-seven million, four hundred thirty-two thousand, six hundred fifty-eight".