68163872067 has 12 divisors (see below), whose sum is σ = 99565207560. Its totient is φ = 44931990048.

The previous prime is 68163872057. The next prime is 68163872083. The reversal of 68163872067 is 76027836186.

It is a de Polignac number, because none of the positive numbers 2^k-68163872067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68163872057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42548433 + ... + 42550034.

It is an arithmetic number, because the mean of its divisors is an integer number (8297100630).

Almost surely, 2^68163872067 is an apocalyptic number.

68163872067 is a deficient number, since it is larger than the sum of its proper divisors (31401335493).

68163872067 is a wasteful number, since it uses less digits than its factorization.

68163872067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85098562 (or 85098559 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 68163872067 in words is "sixty-eight billion, one hundred sixty-three million, eight hundred seventy-two thousand, sixty-seven".