55785612 has 12 divisors (see below), whose sum is σ = 130166456. Its totient is φ = 18595200.

The previous prime is 55785581. The next prime is 55785617. The reversal of 55785612 is 21658755.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×55785612² = 6224069012429088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55785617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2324389 + ... + 2324412.

Almost surely, 2^55785612 is an apocalyptic number.

It is an amenable number.

55785612 is an abundant number, since it is smaller than the sum of its proper divisors (74380844).

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

55785612 is a wasteful number, since it uses less digits than its factorization.

55785612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648808 (or 4648806 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 55785612 is about 7468.9766367288. The cubic root of 55785612 is about 382.0973866082.

The spelling of 55785612 in words is "fifty-five million, seven hundred eighty-five thousand, six hundred twelve".