55642356 has 96 divisors (see below), whose sum is σ = 179880960. Its totient is φ = 14450400.

The previous prime is 55642337. The next prime is 55642373. The reversal of 55642356 is 65324655.

It is a happy number.

55642356 is a `hidden beast` number, since 5 + 5 + 642 + 3 + 5 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55642356.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4971 + ... + 11661.

It is an arithmetic number, because the mean of its divisors is an integer number (1873760).

Almost surely, 2^55642356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55642356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89940480).

55642356 is an abundant number, since it is smaller than the sum of its proper divisors (124238604).

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

55642356 is a wasteful number, since it uses less digits than its factorization.

55642356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722 (or 6714 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 55642356 is about 7459.3804032238. The cubic root of 55642356 is about 381.7700341885.

It can be divided in two parts, 55 and 642356, that added together give a triangular number (642411 = T₁₁₃₃).

The spelling of 55642356 in words is "fifty-five million, six hundred forty-two thousand, three hundred fifty-six".