68984969895 has 48 divisors (see below), whose sum is σ = 124046762112. Its totient is φ = 36778885920.

The previous prime is 68984969887. The next prime is 68984969897. The reversal of 68984969895 is 59896948986.

It is not a de Polignac number, because 68984969895 - 2³ = 68984969887 is a prime.

It is a super-2 number, since 2×68984969895² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68984969897) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4087344 + ... + 4104186.

It is an arithmetic number, because the mean of its divisors is an integer number (2584307544).

Almost surely, 2^68984969895 is an apocalyptic number.

68984969895 is a deficient number, since it is larger than the sum of its proper divisors (55061792217).

68984969895 is a wasteful number, since it uses less digits than its factorization.

68984969895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20234 (or 20222 counting only the distinct ones).

The product of its digits is 2418647040, while the sum is 81.

The spelling of 68984969895 in words is "sixty-eight billion, nine hundred eighty-four million, nine hundred sixty-nine thousand, eight hundred ninety-five".