68151381 has 8 divisors (see below), whose sum is σ = 90927360. Its totient is φ = 45404832.

The previous prime is 68151379. The next prime is 68151437. The reversal of 68151381 is 18315186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68151381 - 2¹ = 68151379 is a prime.

It is a super-2 number, since 2×68151381² = 9289221464414322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68151301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221 + ... + 11738.

It is an arithmetic number, because the mean of its divisors is an integer number (11365920).

Almost surely, 2^68151381 is an apocalyptic number.

It is an amenable number.

68151381 is a deficient number, since it is larger than the sum of its proper divisors (22775979).

68151381 is a wasteful number, since it uses less digits than its factorization.

68151381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14715.

The product of its digits is 5760, while the sum is 33.

The square root of 68151381 is about 8255.3849698242. The cubic root of 68151381 is about 408.4681705286.

The spelling of 68151381 in words is "sixty-eight million, one hundred fifty-one thousand, three hundred eighty-one".