5201655561 has 12 divisors (see below), whose sum is σ = 7514149188. Its totient is φ = 3467471904.

The previous prime is 5201655559. The next prime is 5201655587. The reversal of 5201655561 is 1655561025.

It can be written as a sum of positive squares in 2 ways, for example, as 2655443961 + 2546211600 = 51531^2 + 50460^2 .

It is not a de Polignac number, because 5201655561 - 2¹ = 5201655559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5201655541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150811 + ... + 182063.

It is an arithmetic number, because the mean of its divisors is an integer number (626179099).

Almost surely, 2^5201655561 is an apocalyptic number.

It is an amenable number.

5201655561 is a deficient number, since it is larger than the sum of its proper divisors (2312493627).

5201655561 is a wasteful number, since it uses less digits than its factorization.

5201655561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49752 (or 49749 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 5201655561 is about 72122.5038458871. The cubic root of 5201655561 is about 1732.6620516447.

The spelling of 5201655561 in words is "five billion, two hundred one million, six hundred fifty-five thousand, five hundred sixty-one".