68691723820 has 24 divisors (see below), whose sum is σ = 145653135264. Its totient is φ = 27209924736.

The previous prime is 68691723811. The next prime is 68691723823. The reversal of 68691723820 is 2832719686.

It is not an unprimeable number, because it can be changed into a prime (68691723823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16670689 + ... + 16674808.

It is an arithmetic number, because the mean of its divisors is an integer number (6068880636).

Almost surely, 2^68691723820 is an apocalyptic number.

It is an amenable number.

68691723820 is an abundant number, since it is smaller than the sum of its proper divisors (76961411444).

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

68691723820 is a wasteful number, since it uses less digits than its factorization.

68691723820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33345609 (or 33345607 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 68691723820 in words is "sixty-eight billion, six hundred ninety-one million, seven hundred twenty-three thousand, eight hundred twenty".