55158756 has 24 divisors (see below), whose sum is σ = 129223584. Its totient is φ = 18312000.

The previous prime is 55158751. The next prime is 55158769. The reversal of 55158756 is 65785155.

It is not an unprimeable number, because it can be changed into a prime (55158751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6145 + ... + 12168.

It is an arithmetic number, because the mean of its divisors is an integer number (5384316).

Almost surely, 2^55158756 is an apocalyptic number.

It is an amenable number.

55158756 is an abundant number, since it is smaller than the sum of its proper divisors (74064828).

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

55158756 is a wasteful number, since it uses less digits than its factorization.

55158756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18571 (or 18569 counting only the distinct ones).

The product of its digits is 210000, while the sum is 42.

The square root of 55158756 is about 7426.8941018437. The cubic root of 55158756 is about 380.6607985344.

The spelling of 55158756 in words is "fifty-five million, one hundred fifty-eight thousand, seven hundred fifty-six".