55620303420 has 96 divisors (see below), whose sum is σ = 170103338496. Its totient is φ = 13467155200.

The previous prime is 55620303419. The next prime is 55620303457. The reversal of 55620303420 is 2430302655.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490537 + ... + 593183.

It is an arithmetic number, because the mean of its divisors is an integer number (1771909776).

Almost surely, 2^55620303420 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 55620303420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85051669248).

55620303420 is an abundant number, since it is smaller than the sum of its proper divisors (114483035076).

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

55620303420 is a wasteful number, since it uses less digits than its factorization.

55620303420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103491 (or 103489 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 55620303420 in words is "fifty-five billion, six hundred twenty million, three hundred three thousand, four hundred twenty".