2543505465 has 16 divisors (see below), whose sum is σ = 4209940800. Its totient is φ = 1309758912.

The previous prime is 2543505451. The next prime is 2543505511. The reversal of 2543505465 is 5645053452.

2543505465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2543505465 - 2⁴ = 2543505449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2923135 + ... + 2924004.

It is an arithmetic number, because the mean of its divisors is an integer number (263121300).

Almost surely, 2^2543505465 is an apocalyptic number.

It is an amenable number.

2543505465 is a deficient number, since it is larger than the sum of its proper divisors (1666435335).

2543505465 is a wasteful number, since it uses less digits than its factorization.

2543505465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847176.

The product of its (nonzero) digits is 360000, while the sum is 39.

The square root of 2543505465 is about 50433.1782163290. The cubic root of 2543505465 is about 1365.0363768164.

The spelling of 2543505465 in words is "two billion, five hundred forty-three million, five hundred five thousand, four hundred sixty-five".