2564460769 has 4 divisors (see below), whose sum is σ = 2761726996. Its totient is φ = 2367194544.

The previous prime is 2564460757. The next prime is 2564460781. The reversal of 2564460769 is 9670644652.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2564460757) and next prime (2564460781).

It can be written as a sum of positive squares in 2 ways, for example, as 531533025 + 2032927744 = 23055^2 + 45088^2 .

It is not a de Polignac number, because 2564460769 - 2⁷ = 2564460641 is a prime.

It is a super-2 number, since 2×2564460769² = 13152918071480142722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564461769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98633094 + ... + 98633119.

It is an arithmetic number, because the mean of its divisors is an integer number (690431749).

Almost surely, 2^2564460769 is an apocalyptic number.

It is an amenable number.

2564460769 is a deficient number, since it is larger than the sum of its proper divisors (197266227).

2564460769 is a wasteful number, since it uses less digits than its factorization.

2564460769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197266226.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The square root of 2564460769 is about 50640.5052206235. The cubic root of 2564460769 is about 1368.7748595834.

The spelling of 2564460769 in words is "two billion, five hundred sixty-four million, four hundred sixty thousand, seven hundred sixty-nine".