55679988997655 has 16 divisors (see below), whose sum is σ = 72892590138144. Its totient is φ = 40493191495680.

The previous prime is 55679988997601. The next prime is 55679988997663.

55679988997655 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-55679988997655 is a prime.

It is a super-4 number, since 4×55679988997655⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15153194 + ... + 18465623.

It is an arithmetic number, because the mean of its divisors is an integer number (4555786883634).

Almost surely, 2^{55679988997655} is an apocalyptic number.

55679988997655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55679988997655 is a deficient number, since it is larger than the sum of its proper divisors (17212601140489).

55679988997655 is a wasteful number, since it uses less digits than its factorization.

55679988997655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33648946.

The product of its digits is 462944160000, while the sum is 98.

The spelling of 55679988997655 in words is "fifty-five trillion, six hundred seventy-nine billion, nine hundred eighty-eight million, nine hundred ninety-seven thousand, six hundred fifty-five".