55555559424 has 130 divisors (see below), whose sum is σ = 165961536950. Its totient is φ = 18518409216.

The previous prime is 55555559393. The next prime is 55555559429. The reversal of 55555559424 is 42495555555.

It can be written as a sum of positive squares in only one way, i.e., 42284519424 + 13271040000 = 205632^2 + 115200^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (55555559429) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 248052 + ... + 415500.

Almost surely, 2^55555559424 is an apocalyptic number.

55555559424 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555559424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82980768475).

55555559424 is an abundant number, since it is smaller than the sum of its proper divisors (110405977526).

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

55555559424 is an equidigital number, since it uses as much as digits as its factorization.

55555559424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167485 (or 167454 counting only the distinct ones).

The product of its digits is 22500000, while the sum is 54.

The spelling of 55555559424 in words is "fifty-five billion, five hundred fifty-five million, five hundred fifty-nine thousand, four hundred twenty-four".