5200611561 has 10 divisors (see below), whose sum is σ = 7768814922. Its totient is φ = 3467074320.

The previous prime is 5200611551. The next prime is 5200611569. The reversal of 5200611561 is 1651160025.

It is a happy number.

5200611561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4948278336 + 252333225 = 70344^2 + 15885^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5200611561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (5200611569) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32102460 + ... + 32102621.

Almost surely, 2^5200611561 is an apocalyptic number.

It is an amenable number.

5200611561 is a deficient number, since it is larger than the sum of its proper divisors (2568203361).

5200611561 is an equidigital number, since it uses as much as digits as its factorization.

5200611561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64205093 (or 64205084 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 5200611561 is about 72115.2657971944. The cubic root of 5200611561 is about 1732.5461257186.

Adding to 5200611561 its reverse (1651160025), we get a palindrome (6851771586).

The spelling of 5200611561 in words is "five billion, two hundred million, six hundred eleven thousand, five hundred sixty-one".