5151555565 has 16 divisors (see below), whose sum is σ = 6659151408. Its totient is φ = 3803222016.

The previous prime is 5151555529. The next prime is 5151555587. The reversal of 5151555565 is 5655551515.

It can be written as a sum of positive squares in 8 ways, for example, as 39162564 + 5112393001 = 6258^2 + 71501^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151555565 - 2⁹ = 5151555053 is a prime.

It is a congruent 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, 315277 + ... + 331213.

It is an arithmetic number, because the mean of its divisors is an integer number (416196963).

Almost surely, 2^5151555565 is an apocalyptic number.

It is an amenable number.

5151555565 is a deficient number, since it is larger than the sum of its proper divisors (1507595843).

5151555565 is a wasteful number, since it uses less digits than its factorization.

5151555565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20928.

The product of its digits is 468750, while the sum is 43.

The square root of 5151555565 is about 71774.3377886554. The cubic root of 5151555565 is about 1727.0813568738.

The spelling of 5151555565 in words is "five billion, one hundred fifty-one million, five hundred fifty-five thousand, five hundred sixty-five".