55913643 has 12 divisors (see below), whose sum is σ = 81480360. Its totient is φ = 36945216.

The previous prime is 55913633. The next prime is 55913657. The reversal of 55913643 is 34631955.

55913643 is a `hidden beast` number, since 5 + 5 + 9 + 1 + 3 + 643 = 666.

It is not a de Polignac number, because 55913643 - 2⁸ = 55913387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55913598 and 55913607.

It is not an unprimeable number, because it can be changed into a prime (55913633) 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, 26473 + ... + 28506.

It is an arithmetic number, because the mean of its divisors is an integer number (6790030).

Almost surely, 2^55913643 is an apocalyptic number.

55913643 is a deficient number, since it is larger than the sum of its proper divisors (25566717).

55913643 is a wasteful number, since it uses less digits than its factorization.

55913643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55098 (or 55095 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 55913643 is about 7477.5425776120. The cubic root of 55913643 is about 382.3894746662.

The spelling of 55913643 in words is "fifty-five million, nine hundred thirteen thousand, six hundred forty-three".