55040420000 has 60 divisors (see below), whose sum is σ = 135407738466. Its totient is φ = 22016160000.

The previous prime is 55040419963. The next prime is 55040420033. The reversal of 55040420000 is 2404055.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 9683347216 + 45357072784 = 98404^2 + 212972^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1356011 + ... + 1396010.

Almost surely, 2^55040420000 is an apocalyptic number.

55040420000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55040420000 is an abundant number, since it is smaller than the sum of its proper divisors (80367318466).

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

55040420000 is an equidigital number, since it uses as much as digits as its factorization.

55040420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752051 (or 2752028 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

Adding to 55040420000 its reverse (2404055), we get a palindrome (55042824055).

The spelling of 55040420000 in words is "fifty-five billion, forty million, four hundred twenty thousand".