55888861 has 24 divisors (see below), whose sum is σ = 69029280. Its totient is φ = 44991072.

The previous prime is 55888853. The next prime is 55888879. The reversal of 55888861 is 16888855.

It is not a de Polignac number, because 55888861 - 2³ = 55888853 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55880861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160890 + ... + 161236.

It is an arithmetic number, because the mean of its divisors is an integer number (2876220).

Almost surely, 2^55888861 is an apocalyptic number.

It is an amenable number.

55888861 is a deficient number, since it is larger than the sum of its proper divisors (13140419).

55888861 is a wasteful number, since it uses less digits than its factorization.

55888861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 546 counting only the distinct ones).

The product of its digits is 614400, while the sum is 49.

The square root of 55888861 is about 7475.8852987456. The cubic root of 55888861 is about 382.3329721990.

The spelling of 55888861 in words is "fifty-five million, eight hundred eighty-eight thousand, eight hundred sixty-one".