55567785 has 32 divisors (see below), whose sum is σ = 109428480. Its totient is φ = 23447808.

The previous prime is 55567777. The next prime is 55567789. The reversal of 55567785 is 58776555.

It is not a de Polignac number, because 55567785 - 2³ = 55567777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55567789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18990 + ... + 21719.

It is an arithmetic number, because the mean of its divisors is an integer number (3419640).

Almost surely, 2^55567785 is an apocalyptic number.

It is an amenable number.

55567785 is a deficient number, since it is larger than the sum of its proper divisors (53860695).

55567785 is a wasteful number, since it uses less digits than its factorization.

55567785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40737.

The product of its digits is 1470000, while the sum is 48.

The square root of 55567785 is about 7454.3802559301. The cubic root of 55567785 is about 381.5994105687.

The spelling of 55567785 in words is "fifty-five million, five hundred sixty-seven thousand, seven hundred eighty-five".