55416538777625 has 16 divisors (see below), whose sum is σ = 69160241169552. Its totient is φ = 44332974115200.

The previous prime is 55416538777553. The next prime is 55416538777661. The reversal of 55416538777625 is 52677783561455.

It can be written as a sum of positive squares in 8 ways, for example, as 3899286064921 + 51517252712704 = 1974661^2 + 7177552^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55416538777625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22063109 + ... + 24446141.

It is an arithmetic number, because the mean of its divisors is an integer number (4322515073097).

Almost surely, 2^{55416538777625} is an apocalyptic number.

It is an amenable number.

55416538777625 is a deficient number, since it is larger than the sum of its proper divisors (13743702391927).

55416538777625 is a wasteful number, since it uses less digits than its factorization.

55416538777625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569085 (or 2569075 counting only the distinct ones).

The product of its digits is 1481760000, while the sum is 71.

The spelling of 55416538777625 in words is "fifty-five trillion, four hundred sixteen billion, five hundred thirty-eight million, seven hundred seventy-seven thousand, six hundred twenty-five".