68186085731 has 4 divisors (see below), whose sum is σ = 68189281464. Its totient is φ = 68182890000.

The previous prime is 68186085727. The next prime is 68186085739. The reversal of 68186085731 is 13758068186.

68186085731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13758068186 = 2 ⋅6879034093.

It is a cyclic number.

It is not a de Polignac number, because 68186085731 - 2² = 68186085727 is a prime.

It is a super-2 number, since 2×68186085731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68186085739) 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, 1565645 + ... + 1608606.

It is an arithmetic number, because the mean of its divisors is an integer number (17047320366).

Almost surely, 2^68186085731 is an apocalyptic number.

68186085731 is a deficient number, since it is larger than the sum of its proper divisors (3195733).

68186085731 is a wasteful number, since it uses less digits than its factorization.

68186085731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195732.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 68186085731 in words is "sixty-eight billion, one hundred eighty-six million, eighty-five thousand, seven hundred thirty-one".