2569640769 has 12 divisors (see below), whose sum is σ = 3907056400. Its totient is φ = 1622930904.

The previous prime is 2569640767. The next prime is 2569640771. The reversal of 2569640769 is 9670469652.

2569640769 is a `hidden beast` number, since 2 + 569 + 6 + 4 + 0 + 76 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (2569640767) and next prime (2569640771).

It is not a de Polignac number, because 2569640769 - 2¹ = 2569640767 is a prime.

It is a super-2 number, since 2×2569640769² = 13206107363413822722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2569640767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7513399 + ... + 7513740.

Almost surely, 2^2569640769 is an apocalyptic number.

It is an amenable number.

2569640769 is a deficient number, since it is larger than the sum of its proper divisors (1337415631).

2569640769 is a wasteful number, since it uses less digits than its factorization.

2569640769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15027164 (or 15027161 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The square root of 2569640769 is about 50691.6242489822. The cubic root of 2569640769 is about 1369.6958439996.

It can be divided in two parts, 256 and 9640769, that added together give a square (9641025 = 3105²).

The spelling of 2569640769 in words is "two billion, five hundred sixty-nine million, six hundred forty thousand, seven hundred sixty-nine".