2540232565 has 16 divisors (see below), whose sum is σ = 3475867248. Its totient is φ = 1765518336.

The previous prime is 2540232559. The next prime is 2540232589. The reversal of 2540232565 is 5652320452.

It can be written as a sum of positive squares in 8 ways, for example, as 47527236 + 2492705329 = 6894^2 + 49927^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540232565 - 2³ = 2540232557 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 2540232565.

It is a congruent number.

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, 1148322 + ... + 1150531.

It is an arithmetic number, because the mean of its divisors is an integer number (217241703).

Almost surely, 2^2540232565 is an apocalyptic number.

It is an amenable number.

2540232565 is a deficient number, since it is larger than the sum of its proper divisors (935634683).

2540232565 is a wasteful number, since it uses less digits than its factorization.

2540232565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298888.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 2540232565 is about 50400.7198857318. The cubic root of 2540232565 is about 1364.4506307196.

The spelling of 2540232565 in words is "two billion, five hundred forty million, two hundred thirty-two thousand, five hundred sixty-five".