5161655557 has 2 divisors, whose sum is σ = 5161655558. Its totient is φ = 5161655556.

The previous prime is 5161655537. The next prime is 5161655563. The reversal of 5161655557 is 7555561615.

5161655557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5042278081 + 119377476 = 71009^2 + 10926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5161655557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5161655537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2580827778 + 2580827779.

It is an arithmetic number, because the mean of its divisors is an integer number (2580827779).

Almost surely, 2^5161655557 is an apocalyptic number.

It is an amenable number.

5161655557 is a deficient number, since it is larger than the sum of its proper divisors (1).

5161655557 is an equidigital number, since it uses as much as digits as its factorization.

5161655557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787500, while the sum is 46.

The square root of 5161655557 is about 71844.6626897225. The cubic root of 5161655557 is about 1728.2093087660.

The spelling of 5161655557 in words is "five billion, one hundred sixty-one million, six hundred fifty-five thousand, five hundred fifty-seven".