55917898918 has 8 divisors (see below), whose sum is σ = 95859255312. Its totient is φ = 23964813816.

The previous prime is 55917898903. The next prime is 55917898997. The reversal of 55917898918 is 81989871955.

It is a happy number.

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

It is a super-2 number, since 2×55917898918² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997067805 + ... + 1997067832.

It is an arithmetic number, because the mean of its divisors is an integer number (11982406914).

Almost surely, 2^55917898918 is an apocalyptic number.

55917898918 is a deficient number, since it is larger than the sum of its proper divisors (39941356394).

55917898918 is a wasteful number, since it uses less digits than its factorization.

55917898918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994135646.

The product of its digits is 65318400, while the sum is 70.

The spelling of 55917898918 in words is "fifty-five billion, nine hundred seventeen million, eight hundred ninety-eight thousand, nine hundred eighteen".