55155551564 has 6 divisors (see below), whose sum is σ = 96522215244. Its totient is φ = 27577775780.

The previous prime is 55155551551. The next prime is 55155551593. The reversal of 55155551564 is 46515555155.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6894443942 + ... + 6894443949.

It is an arithmetic number, because the mean of its divisors is an integer number (16087035874).

Almost surely, 2^55155551564 is an apocalyptic number.

It is an amenable number.

55155551564 is a deficient number, since it is larger than the sum of its proper divisors (41366663680).

55155551564 is a wasteful number, since it uses less digits than its factorization.

55155551564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13788887895 (or 13788887893 counting only the distinct ones).

The product of its digits is 1875000, while the sum is 47.

The spelling of 55155551564 in words is "fifty-five billion, one hundred fifty-five million, five hundred fifty-one thousand, five hundred sixty-four".