55985346620 has 96 divisors (see below), whose sum is σ = 137061711360. Its totient is φ = 18811710720.

The previous prime is 55985346607. The next prime is 55985346631. The reversal of 55985346620 is 2664358955.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2723822 + ... + 2744298.

It is an arithmetic number, because the mean of its divisors is an integer number (1427726160).

Almost surely, 2^55985346620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55985346620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68530855680).

55985346620 is an abundant number, since it is smaller than the sum of its proper divisors (81076364740).

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

55985346620 is a wasteful number, since it uses less digits than its factorization.

55985346620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20883 (or 20881 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 55985346620 in words is "fifty-five billion, nine hundred eighty-five million, three hundred forty-six thousand, six hundred twenty".