65268251531921 has 4 divisors (see below), whose sum is σ = 68703422665200. Its totient is φ = 61833080398644.

The previous prime is 65268251531911. The next prime is 65268251531941. The reversal of 65268251531921 is 12913515286256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65268251531921 - 2¹⁰ = 65268251530897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65268251531911) 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, 1717585566611 + ... + 1717585566648.

It is an arithmetic number, because the mean of its divisors is an integer number (17175855666300).

Almost surely, 2^{65268251531921} is an apocalyptic number.

It is an amenable number.

65268251531921 is a deficient number, since it is larger than the sum of its proper divisors (3435171133279).

65268251531921 is a wasteful number, since it uses less digits than its factorization.

65268251531921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435171133278.

The product of its digits is 7776000, while the sum is 56.

The spelling of 65268251531921 in words is "sixty-five trillion, two hundred sixty-eight billion, two hundred fifty-one million, five hundred thirty-one thousand, nine hundred twenty-one".