55405118208448 has 56 divisors (see below), whose sum is σ = 116605461906720. Its totient is φ = 26063704888320.

The previous prime is 55405118208443. The next prime is 55405118208487. The reversal of 55405118208448 is 84480281150455.

It is a super-2 number, since 2×55405118208448² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55405118208443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308429443 + ... + 308609026.

Almost surely, 2^{55405118208448} is an apocalyptic number.

It is an amenable number.

55405118208448 is an abundant number, since it is smaller than the sum of its proper divisors (61200343698272).

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

55405118208448 is a wasteful number, since it uses less digits than its factorization.

55405118208448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617038565 (or 617038555 counting only the distinct ones).

The product of its (nonzero) digits is 8192000, while the sum is 55.

The spelling of 55405118208448 in words is "fifty-five trillion, four hundred five billion, one hundred eighteen million, two hundred eight thousand, four hundred forty-eight".