2645656761 has 16 divisors (see below), whose sum is σ = 3878535168. Its totient is φ = 1590800400.

The previous prime is 2645656759. The next prime is 2645656763. The reversal of 2645656761 is 1676565462.

2645656761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2645656759) and next prime (2645656763).

It is not a de Polignac number, because 2645656761 - 2¹ = 2645656759 is a prime.

It is a super-2 number, since 2×2645656761² = 13998999394050022242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2645656761.

It is not an unprimeable number, because it can be changed into a prime (2645656763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311445 + ... + 319826.

It is an arithmetic number, because the mean of its divisors is an integer number (242408448).

Almost surely, 2^2645656761 is an apocalyptic number.

It is an amenable number.

2645656761 is a deficient number, since it is larger than the sum of its proper divisors (1232878407).

2645656761 is a wasteful number, since it uses less digits than its factorization.

2645656761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631412.

The product of its digits is 1814400, while the sum is 48.

The square root of 2645656761 is about 51435.9481394093. The cubic root of 2645656761 is about 1383.0710784726.

The spelling of 2645656761 in words is "two billion, six hundred forty-five million, six hundred fifty-six thousand, seven hundred sixty-one".