55420742520 has 384 divisors, whose sum is σ = 212985339840. Its totient is φ = 12321054720.

The previous prime is 55420742519. The next prime is 55420742539. The reversal of 55420742520 is 2524702455.

55420742520 is a `hidden beast` number, since 5 + 5 + 4 + 207 + 425 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8078932 + ... + 8085788.

Almost surely, 2^55420742520 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 55420742520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106492669920).

55420742520 is an abundant number, since it is smaller than the sum of its proper divisors (157564597320).

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

55420742520 is a wasteful number, since it uses less digits than its factorization.

55420742520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7055 (or 7048 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 36.

The spelling of 55420742520 in words is "fifty-five billion, four hundred twenty million, seven hundred forty-two thousand, five hundred twenty".