68731861739 has 8 divisors (see below), whose sum is σ = 70226948160. Its totient is φ = 67238138176.

The previous prime is 68731861729. The next prime is 68731861777. The reversal of 68731861739 is 93716813786.

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 68731861739 - 2²⁴ = 68715084523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68731861729) 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, 238424 + ... + 440805.

It is an arithmetic number, because the mean of its divisors is an integer number (8778368520).

Almost surely, 2^68731861739 is an apocalyptic number.

68731861739 is a deficient number, since it is larger than the sum of its proper divisors (1495086421).

68731861739 is a wasteful number, since it uses less digits than its factorization.

68731861739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681429.

The product of its digits is 9144576, while the sum is 59.

The spelling of 68731861739 in words is "sixty-eight billion, seven hundred thirty-one million, eight hundred sixty-one thousand, seven hundred thirty-nine".