55585456057820 has 96 divisors (see below), whose sum is σ = 125883772600320. Its totient is φ = 20495278126080.

The previous prime is 55585456057819. The next prime is 55585456057823. The reversal of 55585456057820 is 2875065458555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55585456057823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1324041230 + ... + 1324083210.

It is an arithmetic number, because the mean of its divisors is an integer number (1311289297920).

Almost surely, 2^{55585456057820} is an apocalyptic number.

It is an amenable number.

55585456057820 is an abundant number, since it is smaller than the sum of its proper divisors (70298316542500).

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

55585456057820 is a wasteful number, since it uses less digits than its factorization.

55585456057820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48975 (or 48973 counting only the distinct ones).

The product of its (nonzero) digits is 336000000, while the sum is 65.

The spelling of 55585456057820 in words is "fifty-five trillion, five hundred eighty-five billion, four hundred fifty-six million, fifty-seven thousand, eight hundred twenty".