68973890815 has 8 divisors (see below), whose sum is σ = 87637414320. Its totient is φ = 51933282432.

The previous prime is 68973890771. The next prime is 68973890863. The reversal of 68973890815 is 51809837986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68973890815 - 2⁹ = 68973890303 is a prime.

It is a super-2 number, since 2×68973890815² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405728685 + ... + 405728854.

It is an arithmetic number, because the mean of its divisors is an integer number (10954676790).

Almost surely, 2^68973890815 is an apocalyptic number.

68973890815 is a deficient number, since it is larger than the sum of its proper divisors (18663523505).

68973890815 is a wasteful number, since it uses less digits than its factorization.

68973890815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811457561.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 68973890815 in words is "sixty-eight billion, nine hundred seventy-three million, eight hundred ninety thousand, eight hundred fifteen".