55812564 has 60 divisors (see below), whose sum is σ = 154502964. Its totient is φ = 17508096.

The previous prime is 55812529. The next prime is 55812583. The reversal of 55812564 is 46521855.

55812564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 44116164 + 11696400 = 6642^2 + 3420^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 442 + ... + 10574.

Almost surely, 2^55812564 is an apocalyptic number.

55812564 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55812564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77251482).

55812564 is an abundant number, since it is smaller than the sum of its proper divisors (98690400).

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

55812564 is a wasteful number, since it uses less digits than its factorization.

55812564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10166 (or 10155 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 55812564 is about 7470.7806820974. The cubic root of 55812564 is about 382.1589116165.

The spelling of 55812564 in words is "fifty-five million, eight hundred twelve thousand, five hundred sixty-four".