55144121616 has 60 divisors (see below), whose sum is σ = 158091040380. Its totient is φ = 17933045760.

The previous prime is 55144121609. The next prime is 55144121621. The reversal of 55144121616 is 61612144155.

55144121616 is a `hidden beast` number, since 5 + 5 + 14 + 4 + 1 + 21 + 616 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18280121616 + 36864000000 = 135204^2 + 192000^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4664161 + ... + 4675968.

It is an arithmetic number, because the mean of its divisors is an integer number (2634850673).

Almost surely, 2^55144121616 is an apocalyptic number.

It is an amenable number.

55144121616 is an abundant number, since it is smaller than the sum of its proper divisors (102946918764).

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

55144121616 is a wasteful number, since it uses less digits than its factorization.

55144121616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9340184 (or 9340175 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 55144121616 in words is "fifty-five billion, one hundred forty-four million, one hundred twenty-one thousand, six hundred sixteen".