6521253465 has 64 divisors (see below), whose sum is σ = 11437701120. Its totient is φ = 3158507520.

The previous prime is 6521253419. The next prime is 6521253467. The reversal of 6521253465 is 5643521256.

It is not a de Polignac number, because 6521253465 - 2⁹ = 6521252953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6521253467) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3232137 + ... + 3234153.

It is an arithmetic number, because the mean of its divisors is an integer number (178714080).

Almost surely, 2^6521253465 is an apocalyptic number.

It is an amenable number.

6521253465 is a deficient number, since it is larger than the sum of its proper divisors (4916447655).

6521253465 is a wasteful number, since it uses less digits than its factorization.

6521253465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482.

The product of its digits is 216000, while the sum is 39.

The square root of 6521253465 is about 80754.2783077157. The cubic root of 6521253465 is about 1868.2874371217.

The spelling of 6521253465 in words is "six billion, five hundred twenty-one million, two hundred fifty-three thousand, four hundred sixty-five".