55679988997654 has 32 divisors (see below), whose sum is σ = 95546885990400. Its totient is φ = 23838985104480.

The previous prime is 55679988997601. The next prime is 55679988997663. The reversal of 55679988997654 is 45679988997655.

It is a super-2 number, since 2×55679988997654² (a number of 28 digits) contains 22 as substring.

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, 507876964 + ... + 507986584.

It is an arithmetic number, because the mean of its divisors is an integer number (2985840187200).

Almost surely, 2^{55679988997654} is an apocalyptic number.

55679988997654 is a deficient number, since it is larger than the sum of its proper divisors (39866896992746).

55679988997654 is a wasteful number, since it uses less digits than its factorization.

55679988997654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145588.

The product of its digits is 370355328000, while the sum is 97.

Subtracting from 55679988997654 its reverse (45679988997655), we obtain a palindrome (9999999999999).

The spelling of 55679988997654 in words is "fifty-five trillion, six hundred seventy-nine billion, nine hundred eighty-eight million, nine hundred ninety-seven thousand, six hundred fifty-four".