65816951383 has 4 divisors (see below), whose sum is σ = 65819307240. Its totient is φ = 65814595528.

The previous prime is 65816951357. The next prime is 65816951399. The reversal of 65816951383 is 38315961856.

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 65816951383 - 2²⁵ = 65783396951 is a prime.

It is a super-2 number, since 2×65816951383² (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 (65810951383) 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, 1135513 + ... + 1192066.

It is an arithmetic number, because the mean of its divisors is an integer number (16454826810).

Almost surely, 2^65816951383 is an apocalyptic number.

65816951383 is a deficient number, since it is larger than the sum of its proper divisors (2355857).

65816951383 is a wasteful number, since it uses less digits than its factorization.

65816951383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355856.

The product of its digits is 4665600, while the sum is 55.

The spelling of 65816951383 in words is "sixty-five billion, eight hundred sixteen million, nine hundred fifty-one thousand, three hundred eighty-three".