68787931967 has 8 divisors (see below), whose sum is σ = 68868604272. Its totient is φ = 68707310400.

The previous prime is 68787931931. The next prime is 68787931969. The reversal of 68787931967 is 76913978786.

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 68787931967 - 2⁶ = 68787931903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68787931967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68787931969) 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, 3142043 + ... + 3163859.

It is an arithmetic number, because the mean of its divisors is an integer number (8608575534).

Almost surely, 2^68787931967 is an apocalyptic number.

68787931967 is a deficient number, since it is larger than the sum of its proper divisors (80672305).

68787931967 is a wasteful number, since it uses less digits than its factorization.

68787931967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25369.

The product of its digits is 192036096, while the sum is 71.

The spelling of 68787931967 in words is "sixty-eight billion, seven hundred eighty-seven million, nine hundred thirty-one thousand, nine hundred sixty-seven".