55808218464 has 48 divisors (see below), whose sum is σ = 154206924480. Its totient is φ = 17623647360.

The previous prime is 55808218451. The next prime is 55808218481. The reversal of 55808218464 is 46481280855.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×55808218464² (a number of 22 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 7 ways as a sum of consecutive naturals, for example, 15296482 + ... + 15300129.

It is an arithmetic number, because the mean of its divisors is an integer number (3212644260).

Almost surely, 2^55808218464 is an apocalyptic number.

It is an amenable number.

55808218464 is an abundant number, since it is smaller than the sum of its proper divisors (98398706016).

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

55808218464 is a wasteful number, since it uses less digits than its factorization.

55808218464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30596643 (or 30596635 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 51.

The spelling of 55808218464 in words is "fifty-five billion, eight hundred eight million, two hundred eighteen thousand, four hundred sixty-four".