68137417387 has 4 divisors (see below), whose sum is σ = 73378757200. Its totient is φ = 62896077576.

The previous prime is 68137417357. The next prime is 68137417391. The reversal of 68137417387 is 78371473186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68137417387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68137417357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620669887 + ... + 2620669912.

It is an arithmetic number, because the mean of its divisors is an integer number (18344689300).

Almost surely, 2^68137417387 is an apocalyptic number.

68137417387 is a deficient number, since it is larger than the sum of its proper divisors (5241339813).

68137417387 is a wasteful number, since it uses less digits than its factorization.

68137417387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241339812.

The product of its digits is 4741632, while the sum is 55.

The spelling of 68137417387 in words is "sixty-eight billion, one hundred thirty-seven million, four hundred seventeen thousand, three hundred eighty-seven".