55508903890386 has 32 divisors (see below), whose sum is σ = 112731673380480. Its totient is φ = 18219260269056.

The previous prime is 55508903890369. The next prime is 55508903890469. The reversal of 55508903890386 is 68309830980555.

It is a super-2 number, since 2×55508903890386² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55508903890386.

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, 241956726 + ... + 242186033.

It is an arithmetic number, because the mean of its divisors is an integer number (3522864793140).

Almost surely, 2^{55508903890386} is an apocalyptic number.

55508903890386 is an abundant number, since it is smaller than the sum of its proper divisors (57222769490094).

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

55508903890386 is a wasteful number, since it uses less digits than its factorization.

55508903890386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484143058.

The product of its (nonzero) digits is 279936000, while the sum is 69.

The spelling of 55508903890386 in words is "fifty-five trillion, five hundred eight billion, nine hundred three million, eight hundred ninety thousand, three hundred eighty-six".