55005866494438 has 4 divisors (see below), whose sum is σ = 82508799741660. Its totient is φ = 27502933247218.

The previous prime is 55005866494427. The next prime is 55005866494457. The reversal of 55005866494438 is 83449466850055.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13751466623608 + ... + 13751466623611.

It is an arithmetic number, because the mean of its divisors is an integer number (20627199935415).

Almost surely, 2^{55005866494438} is an apocalyptic number.

55005866494438 is a deficient number, since it is larger than the sum of its proper divisors (27502933247222).

55005866494438 is a wasteful number, since it uses less digits than its factorization.

55005866494438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27502933247221.

The product of its (nonzero) digits is 497664000, while the sum is 67.

The spelling of 55005866494438 in words is "fifty-five trillion, five billion, eight hundred sixty-six million, four hundred ninety-four thousand, four hundred thirty-eight".