55426835520 has 280 divisors, whose sum is σ = 225329886144. Its totient is φ = 12668949504.

The previous prime is 55426835509. The next prime is 55426835521. The reversal of 55426835520 is 2553862455.

55426835520 is a `hidden beast` number, since 5 + 5 + 42 + 6 + 83 + 5 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (280).

It is a super-2 number, since 2×55426835520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (55426835521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 28699 + ... + 334181.

Almost surely, 2^55426835520 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 55426835520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112664943072).

55426835520 is an abundant number, since it is smaller than the sum of its proper divisors (169903050624).

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

55426835520 is a wasteful number, since it uses less digits than its factorization.

55426835520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305519 (or 305500 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 45.

The spelling of 55426835520 in words is "fifty-five billion, four hundred twenty-six million, eight hundred thirty-five thousand, five hundred twenty".