2565145969 has 2 divisors, whose sum is σ = 2565145970. Its totient is φ = 2565145968.

The previous prime is 2565145943. The next prime is 2565146021. The reversal of 2565145969 is 9695415652.

It is an a-pointer prime, because the next prime (2565146021) can be obtained adding 2565145969 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2429306944 + 135839025 = 49288^2 + 11655^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565145969 - 2¹¹ = 2565143921 is a prime.

It is a super-2 number, since 2×2565145969² = 13159947684553897922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2565145169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282572984 + 1282572985.

It is an arithmetic number, because the mean of its divisors is an integer number (1282572985).

Almost surely, 2^2565145969 is an apocalyptic number.

It is an amenable number.

2565145969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565145969 is an equidigital number, since it uses as much as digits as its factorization.

2565145969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 52.

The square root of 2565145969 is about 50647.2701041231. The cubic root of 2565145969 is about 1368.8967566863.

The spelling of 2565145969 in words is "two billion, five hundred sixty-five million, one hundred forty-five thousand, nine hundred sixty-nine".