55816839 has 24 divisors (see below), whose sum is σ = 87127040. Its totient is φ = 34229952.

The previous prime is 55816819. The next prime is 55816843. The reversal of 55816839 is 93861855.

55816839 is a `hidden beast` number, since 5 + 581 + 68 + 3 + 9 = 666.

It is not a de Polignac number, because 55816839 - 2⁸ = 55816583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55816794 and 55816803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55816819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43002 + ... + 44280.

Almost surely, 2^55816839 is an apocalyptic number.

55816839 is a deficient number, since it is larger than the sum of its proper divisors (31310201).

55816839 is a wasteful number, since it uses less digits than its factorization.

55816839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671 (or 1668 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55816839 is about 7471.0667912956. The cubic root of 55816839 is about 382.1686686050.

The spelling of 55816839 in words is "fifty-five million, eight hundred sixteen thousand, eight hundred thirty-nine".