2645959161 has 4 divisors (see below), whose sum is σ = 3527945552. Its totient is φ = 1763972772.

The previous prime is 2645959153. The next prime is 2645959181. The reversal of 2645959161 is 1619595462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2645959161 - 2³ = 2645959153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2645959161.

It is not an unprimeable number, because it can be changed into a prime (2645959111) 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, 440993191 + ... + 440993196.

It is an arithmetic number, because the mean of its divisors is an integer number (881986388).

Almost surely, 2^2645959161 is an apocalyptic number.

It is an amenable number.

2645959161 is a deficient number, since it is larger than the sum of its proper divisors (881986391).

2645959161 is an equidigital number, since it uses as much as digits as its factorization.

2645959161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881986390.

The product of its digits is 583200, while the sum is 48.

The square root of 2645959161 is about 51438.8876337737. The cubic root of 2645959161 is about 1383.1237717227.

The spelling of 2645959161 in words is "two billion, six hundred forty-five million, nine hundred fifty-nine thousand, one hundred sixty-one".