55144540242 has 36 divisors (see below), whose sum is σ = 131329082430. Its totient is φ = 16710466080.

The previous prime is 55144540207. The next prime is 55144540249. The reversal of 55144540242 is 24204544155.

55144540242 is a `hidden beast` number, since 5 + 51 + 44 + 540 + 24 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53620496721 + 1524043521 = 231561^2 + 39039^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55144540197 and 55144540206.

It is not an unprimeable number, because it can be changed into a prime (55144540249) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12657267 + ... + 12661622.

Almost surely, 2^55144540242 is an apocalyptic number.

55144540242 is an abundant number, since it is smaller than the sum of its proper divisors (76184542188).

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

55144540242 is a wasteful number, since it uses less digits than its factorization.

55144540242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25318919 (or 25318905 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

The spelling of 55144540242 in words is "fifty-five billion, one hundred forty-four million, five hundred forty thousand, two hundred forty-two".