65751313519 has 4 divisors (see below), whose sum is σ = 65868101496. Its totient is φ = 65634525544.

The previous prime is 65751313447. The next prime is 65751313543. The reversal of 65751313519 is 91531315756.

It is a happy number.

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 65751313519 - 2¹³ = 65751305327 is a prime.

It is a super-2 number, since 2×65751313519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65751313819) 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, 58393144 + ... + 58394269.

It is an arithmetic number, because the mean of its divisors is an integer number (16467025374).

Almost surely, 2^65751313519 is an apocalyptic number.

65751313519 is a deficient number, since it is larger than the sum of its proper divisors (116787977).

65751313519 is a wasteful number, since it uses less digits than its factorization.

65751313519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116787976.

The product of its digits is 425250, while the sum is 46.

The spelling of 65751313519 in words is "sixty-five billion, seven hundred fifty-one million, three hundred thirteen thousand, five hundred nineteen".