2565366651 has 48 divisors (see below), whose sum is σ = 3917160000. Its totient is φ = 1615461120.

The previous prime is 2565366647. The next prime is 2565366667. The reversal of 2565366651 is 1566635652.

It is not a de Polignac number, because 2565366651 - 2² = 2565366647 is a prime.

It is a super-2 number, since 2×2565366651² = 13162212108125911602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2565366597 and 2565366606.

It is not an unprimeable number, because it can be changed into a prime (2565366611) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4282450 + ... + 4283048.

It is an arithmetic number, because the mean of its divisors is an integer number (81607500).

Almost surely, 2^2565366651 is an apocalyptic number.

2565366651 is a deficient number, since it is larger than the sum of its proper divisors (1351793349).

2565366651 is a wasteful number, since it uses less digits than its factorization.

2565366651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 961 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The square root of 2565366651 is about 50649.4486741959. The cubic root of 2565366651 is about 1368.9360113999.

The spelling of 2565366651 in words is "two billion, five hundred sixty-five million, three hundred sixty-six thousand, six hundred fifty-one".