65256607507 has 32 divisors (see below), whose sum is σ = 85917186432. Its totient is φ = 48093364224.

The previous prime is 65256607459. The next prime is 65256607513. The reversal of 65256607507 is 70570665256.

It is a cyclic number.

It is not a de Polignac number, because 65256607507 - 2¹⁹ = 65256083219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65256607547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67378 + ... + 367495.

It is an arithmetic number, because the mean of its divisors is an integer number (2684912076).

Almost surely, 2^65256607507 is an apocalyptic number.

65256607507 is a deficient number, since it is larger than the sum of its proper divisors (20660578925).

65256607507 is a wasteful number, since it uses less digits than its factorization.

65256607507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435007.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 65256607507 in words is "sixty-five billion, two hundred fifty-six million, six hundred seven thousand, five hundred seven".