68813880975 has 72 divisors (see below), whose sum is σ = 140959728000. Its totient is φ = 31435709760.

The previous prime is 68813880917. The next prime is 68813880983. The reversal of 68813880975 is 57908831886.

It is a Cunningham number, because it is equal to 262324²-1.

It is not a de Polignac number, because 68813880975 - 2⁶ = 68813880911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2346352 + ... + 2375498.

It is an arithmetic number, because the mean of its divisors is an integer number (1957774000).

Almost surely, 2^68813880975 is an apocalyptic number.

68813880975 is an abundant number, since it is smaller than the sum of its proper divisors (72145847025).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68813880975 is a wasteful number, since it uses less digits than its factorization.

68813880975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30669 (or 30661 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 68813880975 in words is "sixty-eight billion, eight hundred thirteen million, eight hundred eighty thousand, nine hundred seventy-five".