55556671729891 has 8 divisors (see below), whose sum is σ = 61382307384864. Its totient is φ = 50015213424000.

The previous prime is 55556671729877. The next prime is 55556671729903. The reversal of 55556671729891 is 19892717665555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55556671729891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55556671759891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71044336860 + ... + 71044337641.

It is an arithmetic number, because the mean of its divisors is an integer number (7672788423108).

Almost surely, 2^{55556671729891} is an apocalyptic number.

55556671729891 is a deficient number, since it is larger than the sum of its proper divisors (5825635654973).

55556671729891 is a wasteful number, since it uses less digits than its factorization.

55556671729891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142088674541.

The product of its digits is 1428840000, while the sum is 76.

The spelling of 55556671729891 in words is "fifty-five trillion, five hundred fifty-six billion, six hundred seventy-one million, seven hundred twenty-nine thousand, eight hundred ninety-one".