55567791 has 12 divisors (see below), whose sum is σ = 80449200. Its totient is φ = 36960000.

The previous prime is 55567789. The next prime is 55567801. The reversal of 55567791 is 19776555.

It is a happy number.

55567791 is a `hidden beast` number, since 5 + 556 + 7 + 7 + 91 = 666.

It is not a de Polignac number, because 55567791 - 2¹ = 55567789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55567091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2835 + ... + 10916.

It is an arithmetic number, because the mean of its divisors is an integer number (6704100).

Almost surely, 2^55567791 is an apocalyptic number.

55567791 is a deficient number, since it is larger than the sum of its proper divisors (24881409).

55567791 is a wasteful number, since it uses less digits than its factorization.

55567791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14206 (or 14203 counting only the distinct ones).

The product of its digits is 330750, while the sum is 45.

The square root of 55567791 is about 7454.3806583780. The cubic root of 55567791 is about 381.5994243033.

The spelling of 55567791 in words is "fifty-five million, five hundred sixty-seven thousand, seven hundred ninety-one".