68513580819 has 24 divisors (see below), whose sum is σ = 100682165792. Its totient is φ = 44887271040.

The previous prime is 68513580791. The next prime is 68513580823. The reversal of 68513580819 is 91808531586.

68513580819 is a `hidden beast` number, since 6 + 8 + 51 + 3 + 580 + 8 + 1 + 9 = 666.

It is not a de Polignac number, because 68513580819 - 2⁷ = 68513580691 is a prime.

It is a super-2 number, since 2×68513580819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68513580899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6247 + ... + 370224.

Almost surely, 2^68513580819 is an apocalyptic number.

68513580819 is a deficient number, since it is larger than the sum of its proper divisors (32168584973).

68513580819 is a wasteful number, since it uses less digits than its factorization.

68513580819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376827 (or 376824 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 68513580819 in words is "sixty-eight billion, five hundred thirteen million, five hundred eighty thousand, eight hundred nineteen".