55891716939 has 12 divisors (see below), whose sum is σ = 81017757496. Its totient is φ = 37129478112.

The previous prime is 55891716931. The next prime is 55891716943. The reversal of 55891716939 is 93961719855.

55891716939 is a `hidden beast` number, since 5 + 589 + 1 + 7 + 16 + 9 + 39 = 666.

It is not a de Polignac number, because 55891716939 - 2³ = 55891716931 is a prime.

It is a super-3 number, since 3×55891716939³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55891716931) 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, 10969522 + ... + 10974615.

Almost surely, 2^55891716939 is an apocalyptic number.

55891716939 is a deficient number, since it is larger than the sum of its proper divisors (25126040557).

55891716939 is a wasteful number, since it uses less digits than its factorization.

55891716939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21944426 (or 21944423 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 63.

The spelling of 55891716939 in words is "fifty-five billion, eight hundred ninety-one million, seven hundred sixteen thousand, nine hundred thirty-nine".