55616677818 has 16 divisors (see below), whose sum is σ = 119789767776. Its totient is φ = 17112823920.

The previous prime is 55616677789. The next prime is 55616677829. The reversal of 55616677818 is 81877661655.

It is a happy number.

It is a super-2 number, since 2×55616677818² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 356517088 + ... + 356517243.

It is an arithmetic number, because the mean of its divisors is an integer number (7486860486).

Almost surely, 2^55616677818 is an apocalyptic number.

55616677818 is an abundant number, since it is smaller than the sum of its proper divisors (64173089958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55616677818 is a wasteful number, since it uses less digits than its factorization.

55616677818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713034349.

The product of its digits is 16934400, while the sum is 60.

The spelling of 55616677818 in words is "fifty-five billion, six hundred sixteen million, six hundred seventy-seven thousand, eight hundred eighteen".