55878664560 has 40 divisors (see below), whose sum is σ = 173223860880. Its totient is φ = 14900977152.

The previous prime is 55878664511. The next prime is 55878664601. The reversal of 55878664560 is 6546687855.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 55878664494 and 55878664503.

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, 116413645 + ... + 116414124.

It is an arithmetic number, because the mean of its divisors is an integer number (4330596522).

Almost surely, 2^55878664560 is an apocalyptic number.

It is an amenable number.

55878664560 is an abundant number, since it is smaller than the sum of its proper divisors (117345196320).

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

55878664560 is a wasteful number, since it uses less digits than its factorization.

55878664560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232827785 (or 232827779 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 60.

The spelling of 55878664560 in words is "fifty-five billion, eight hundred seventy-eight million, six hundred sixty-four thousand, five hundred sixty".