68276581565 has 4 divisors (see below), whose sum is σ = 81931897884. Its totient is φ = 54621265248.

The previous prime is 68276581553. The next prime is 68276581589. The reversal of 68276581565 is 56518567286.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11393854564 + 56882727001 = 106742^2 + 238501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68276581565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6827658152 + ... + 6827658161.

It is an arithmetic number, because the mean of its divisors is an integer number (20482974471).

Almost surely, 2^68276581565 is an apocalyptic number.

It is an amenable number.

68276581565 is a deficient number, since it is larger than the sum of its proper divisors (13655316319).

68276581565 is a wasteful number, since it uses less digits than its factorization.

68276581565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13655316318.

The product of its digits is 24192000, while the sum is 59.

The spelling of 68276581565 in words is "sixty-eight billion, two hundred seventy-six million, five hundred eighty-one thousand, five hundred sixty-five".