68850109831 has 4 divisors (see below), whose sum is σ = 68869557064. Its totient is φ = 68830662600.

The previous prime is 68850109799. The next prime is 68850109841. The reversal of 68850109831 is 13890105886.

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

It is a cyclic number.

It is not a de Polignac number, because 68850109831 - 2⁵ = 68850109799 is a prime.

It is a super-2 number, since 2×68850109831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68850109841) 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, 9718305 + ... + 9725386.

It is an arithmetic number, because the mean of its divisors is an integer number (17217389266).

Almost surely, 2^68850109831 is an apocalyptic number.

68850109831 is a deficient number, since it is larger than the sum of its proper divisors (19447233).

68850109831 is a wasteful number, since it uses less digits than its factorization.

68850109831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19447232.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 68850109831 in words is "sixty-eight billion, eight hundred fifty million, one hundred nine thousand, eight hundred thirty-one".