55120521025 has 6 divisors (see below), whose sum is σ = 68349446102. Its totient is φ = 44096416800.

The previous prime is 55120520999. The next prime is 55120521041. The reversal of 55120521025 is 52012502155.

It can be written as a sum of positive squares in 3 ways, for example, as 6563754289 + 48556766736 = 81017^2 + 220356^2 .

It is not a de Polignac number, because 55120521025 - 2¹⁵ = 55120488257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55120520984 and 55120521002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1102410396 + ... + 1102410445.

Almost surely, 2^55120521025 is an apocalyptic number.

It is an amenable number.

55120521025 is a deficient number, since it is larger than the sum of its proper divisors (13228925077).

55120521025 is a wasteful number, since it uses less digits than its factorization.

55120521025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204820851 (or 2204820846 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 55120521025 in words is "fifty-five billion, one hundred twenty million, five hundred twenty-one thousand, twenty-five".