65321264251 has 4 divisors (see below), whose sum is σ = 66711078432. Its totient is φ = 63931450072.

The previous prime is 65321264249. The next prime is 65321264311. The reversal of 65321264251 is 15246212356.

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

It is a cyclic number.

It is not a de Polignac number, because 65321264251 - 2¹ = 65321264249 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 65321264251.

It is not an unprimeable number, because it can be changed into a prime (65321264651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694907020 + ... + 694907113.

It is an arithmetic number, because the mean of its divisors is an integer number (16677769608).

Almost surely, 2^65321264251 is an apocalyptic number.

65321264251 is a deficient number, since it is larger than the sum of its proper divisors (1389814181).

65321264251 is a wasteful number, since it uses less digits than its factorization.

65321264251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389814180.

The product of its digits is 86400, while the sum is 37.

The spelling of 65321264251 in words is "sixty-five billion, three hundred twenty-one million, two hundred sixty-four thousand, two hundred fifty-one".