55136405139 has 4 divisors (see below), whose sum is σ = 73515206856. Its totient is φ = 36757603424.

The previous prime is 55136405131. The next prime is 55136405153. The reversal of 55136405139 is 93150463155.

55136405139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55136405139 - 2³ = 55136405131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55136405139.

It is not an unprimeable number, because it can be changed into a prime (55136405131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9189400854 + ... + 9189400859.

It is an arithmetic number, because the mean of its divisors is an integer number (18378801714).

Almost surely, 2^55136405139 is an apocalyptic number.

55136405139 is a deficient number, since it is larger than the sum of its proper divisors (18378801717).

55136405139 is a wasteful number, since it uses less digits than its factorization.

55136405139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18378801716.

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 55136405139 in words is "fifty-five billion, one hundred thirty-six million, four hundred five thousand, one hundred thirty-nine".