65319918013 has 4 divisors (see below), whose sum is σ = 74651334880. Its totient is φ = 55988501148.

The previous prime is 65319917987. The next prime is 65319918031. The reversal of 65319918013 is 31081991356.

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 65319918013 - 2¹³ = 65319909821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65319918073) 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, 4665708423 + ... + 4665708436.

It is an arithmetic number, because the mean of its divisors is an integer number (18662833720).

Almost surely, 2^65319918013 is an apocalyptic number.

It is an amenable number.

65319918013 is a deficient number, since it is larger than the sum of its proper divisors (9331416867).

65319918013 is an equidigital number, since it uses as much as digits as its factorization.

65319918013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331416866.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 65319918013 in words is "sixty-five billion, three hundred nineteen million, nine hundred eighteen thousand, thirteen".