2640251514265 has 4 divisors (see below), whose sum is σ = 3168301817124. Its totient is φ = 2112201211408.

The previous prime is 2640251514259. The next prime is 2640251514281. The reversal of 2640251514265 is 5624151520462.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1541662439769 + 1098589074496 = 1241637^2 + 1048136^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640251514265 - 2⁷ = 2640251514137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264025151422 + ... + 264025151431.

It is an arithmetic number, because the mean of its divisors is an integer number (792075454281).

Almost surely, 2^{2640251514265} is an apocalyptic number.

It is an amenable number.

2640251514265 is a deficient number, since it is larger than the sum of its proper divisors (528050302859).

2640251514265 is an equidigital number, since it uses as much as digits as its factorization.

2640251514265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528050302858.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 2640251514265 in words is "two trillion, six hundred forty billion, two hundred fifty-one million, five hundred fourteen thousand, two hundred sixty-five".