55615665344000 has 80 divisors (see below), whose sum is σ = 138681137673936. Its totient is φ = 22246266112000.

The previous prime is 55615665343961. The next prime is 55615665344027. The reversal of 55615665344000 is 44356651655.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 55615665344000.

It is a congruent number.

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, 434433386 + ... + 434561385.

Almost surely, 2^{55615665344000} is an apocalyptic number.

55615665344000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55615665344000 is an abundant number, since it is smaller than the sum of its proper divisors (83065472329936).

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

55615665344000 is an frugal number, since it uses more digits than its factorization.

55615665344000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868994804 (or 868994778 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 50.

The spelling of 55615665344000 in words is "fifty-five trillion, six hundred fifteen billion, six hundred sixty-five million, three hundred forty-four thousand".