68705581023 has 16 divisors (see below), whose sum is σ = 102835390560. Its totient is φ = 45331515648.

The previous prime is 68705581019. The next prime is 68705581033. The reversal of 68705581023 is 32018550786.

68705581023 is a `hidden beast` number, since 6 + 8 + 70 + 558 + 1 + 0 + 23 = 666.

It is not a de Polignac number, because 68705581023 - 2² = 68705581019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68705581023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68705581003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13114140 + ... + 13119377.

It is an arithmetic number, because the mean of its divisors is an integer number (6427211910).

Almost surely, 2^68705581023 is an apocalyptic number.

68705581023 is a deficient number, since it is larger than the sum of its proper divisors (34129809537).

68705581023 is a wasteful number, since it uses less digits than its factorization.

68705581023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26233623 (or 26233617 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 68705581023 in words is "sixty-eight billion, seven hundred five million, five hundred eighty-one thousand, twenty-three".