55646442 has 24 divisors (see below), whose sum is σ = 121492800. Its totient is φ = 18406440.

The previous prime is 55646441. The next prime is 55646443. The reversal of 55646442 is 24464655.

55646442 is a `hidden beast` number, since 5 + 5 + 6 + 4 + 644 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (55646441) and next prime (55646443).

It is a super-3 number, since 3×55646442³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55646397 and 55646406.

It is not an unprimeable number, because it can be changed into a prime (55646441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9442 + ... + 14157.

It is an arithmetic number, because the mean of its divisors is an integer number (5062200).

Almost surely, 2^55646442 is an apocalyptic number.

55646442 is an abundant number, since it is smaller than the sum of its proper divisors (65846358).

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

55646442 is a wasteful number, since it uses less digits than its factorization.

55646442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23738 (or 23735 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 55646442 is about 7459.6542815334. The cubic root of 55646442 is about 381.7793788335.

The spelling of 55646442 in words is "fifty-five million, six hundred forty-six thousand, four hundred forty-two".