55617155165238 has 16 divisors (see below), whose sum is σ = 111240345071856. Its totient is φ = 18538045931520.

The previous prime is 55617155165191. The next prime is 55617155165267. The reversal of 55617155165238 is 83256155171655.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251327743 + ... + 251548938.

It is an arithmetic number, because the mean of its divisors is an integer number (6952521566991).

Almost surely, 2^{55617155165238} is an apocalyptic number.

55617155165238 is an abundant number, since it is smaller than the sum of its proper divisors (55623189906618).

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

55617155165238 is a wasteful number, since it uses less digits than its factorization.

55617155165238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502895119.

The product of its digits is 37800000, while the sum is 60.

The spelling of 55617155165238 in words is "fifty-five trillion, six hundred seventeen billion, one hundred fifty-five million, one hundred sixty-five thousand, two hundred thirty-eight".