68631423381 has 6 divisors (see below), whose sum is σ = 99134278230. Its totient is φ = 45754282248.

The previous prime is 68631423379. The next prime is 68631423389. The reversal of 68631423381 is 18332413686.

68631423381 is a `hidden beast` number, since 6 + 8 + 631 + 4 + 2 + 3 + 3 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56200288356 + 12431135025 = 237066^2 + 111495^2 .

It is not a de Polignac number, because 68631423381 - 2¹ = 68631423379 is a prime.

It is a super-2 number, since 2×68631423381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68631423389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3812856846 + ... + 3812856863.

It is an arithmetic number, because the mean of its divisors is an integer number (16522379705).

Almost surely, 2^68631423381 is an apocalyptic number.

It is an amenable number.

68631423381 is a deficient number, since it is larger than the sum of its proper divisors (30502854849).

68631423381 is a wasteful number, since it uses less digits than its factorization.

68631423381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7625713715 (or 7625713712 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 68631423381 in words is "sixty-eight billion, six hundred thirty-one million, four hundred twenty-three thousand, three hundred eighty-one".