55817646 has 16 divisors (see below), whose sum is σ = 114358608. Its totient is φ = 18152000.

The previous prime is 55817627. The next prime is 55817651. The reversal of 55817646 is 64671855.

It is a junction number, because it is equal to n+sod(n) for n = 55817598 and 55817607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113205 + ... + 113696.

It is an arithmetic number, because the mean of its divisors is an integer number (7147413).

Almost surely, 2^55817646 is an apocalyptic number.

55817646 is an abundant number, since it is smaller than the sum of its proper divisors (58540962).

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

55817646 is a wasteful number, since it uses less digits than its factorization.

55817646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226947.

The product of its digits is 201600, while the sum is 42.

The square root of 55817646 is about 7471.1207994517. The cubic root of 55817646 is about 382.1705103946.

The spelling of 55817646 in words is "fifty-five million, eight hundred seventeen thousand, six hundred forty-six".