55111564 has 6 divisors (see below), whose sum is σ = 96445244. Its totient is φ = 27555780.

The previous prime is 55111561. The next prime is 55111577. The reversal of 55111564 is 46511155.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55111561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6888942 + ... + 6888949.

Almost surely, 2^55111564 is an apocalyptic number.

It is an amenable number.

55111564 is a deficient number, since it is larger than the sum of its proper divisors (41333680).

55111564 is a wasteful number, since it uses less digits than its factorization.

55111564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13777895 (or 13777893 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 55111564 is about 7423.7163200112. The cubic root of 55111564 is about 380.5522073132.

The spelling of 55111564 in words is "fifty-five million, one hundred eleven thousand, five hundred sixty-four".