2565311655 has 8 divisors (see below), whose sum is σ = 4104498672. Its totient is φ = 1368166208.

The previous prime is 2565311591. The next prime is 2565311687. The reversal of 2565311655 is 5561135652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2565311655 - 2⁶ = 2565311591 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 85510374 + ... + 85510403.

It is an arithmetic number, because the mean of its divisors is an integer number (513062334).

Almost surely, 2^2565311655 is an apocalyptic number.

2565311655 is a deficient number, since it is larger than the sum of its proper divisors (1539187017).

2565311655 is a wasteful number, since it uses less digits than its factorization.

2565311655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171020785.

The product of its digits is 135000, while the sum is 39.

The square root of 2565311655 is about 50648.9057631061. The cubic root of 2565311655 is about 1368.9262289720.

The spelling of 2565311655 in words is "two billion, five hundred sixty-five million, three hundred eleven thousand, six hundred fifty-five".