55545055661540 has 12 divisors (see below), whose sum is σ = 116644616889276. Its totient is φ = 22218022264608.

The previous prime is 55545055661531. The next prime is 55545055661551. The reversal of 55545055661540 is 4516655054555.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31543522115044 + 24001533546496 = 5616362^2 + 4899136^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388626391519 + ... + 1388626391558.

It is an arithmetic number, because the mean of its divisors is an integer number (9720384740773).

Almost surely, 2^{55545055661540} is an apocalyptic number.

It is an amenable number.

55545055661540 is an abundant number, since it is smaller than the sum of its proper divisors (61099561227736).

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

55545055661540 is a wasteful number, since it uses less digits than its factorization.

55545055661540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777252783086 (or 2777252783084 counting only the distinct ones).

The product of its (nonzero) digits is 45000000, while the sum is 56.

The spelling of 55545055661540 in words is "fifty-five trillion, five hundred forty-five billion, fifty-five million, six hundred sixty-one thousand, five hundred forty".