55144115640 has 96 divisors (see below), whose sum is σ = 184999651200. Its totient is φ = 14230736640.

The previous prime is 55144115639. The next prime is 55144115713. The reversal of 55144115640 is 4651144155.

55144115640 is a `hidden beast` number, since 5 + 5 + 1 + 4 + 4 + 1 + 1 + 5 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 55144115595 and 55144115604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2459455 + ... + 2481774.

It is an arithmetic number, because the mean of its divisors is an integer number (1927079700).

Almost surely, 2^55144115640 is an apocalyptic number.

It is an amenable number.

55144115640 is an abundant number, since it is smaller than the sum of its proper divisors (129855535560).

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

55144115640 is a wasteful number, since it uses less digits than its factorization.

55144115640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4941277 (or 4941270 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 55144115640 its reverse (4651144155), we get a palindrome (59795259795).

The spelling of 55144115640 in words is "fifty-five billion, one hundred forty-four million, one hundred fifteen thousand, six hundred forty".