68755631 has 4 divisors (see below), whose sum is σ = 78577872. Its totient is φ = 58933392.

The previous prime is 68755627. The next prime is 68755639. The reversal of 68755631 is 13655786.

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

It is not a de Polignac number, because 68755631 - 2² = 68755627 is a prime.

It is a super-2 number, since 2×68755631² = 9454673588416322, which 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 (68755639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4911110 + ... + 4911123.

It is an arithmetic number, because the mean of its divisors is an integer number (19644468).

Almost surely, 2^68755631 is an apocalyptic number.

68755631 is a deficient number, since it is larger than the sum of its proper divisors (9822241).

68755631 is an equidigital number, since it uses as much as digits as its factorization.

68755631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822240.

The product of its digits is 151200, while the sum is 41.

The square root of 68755631 is about 8291.9015310121. The cubic root of 68755631 is about 409.6718194752.

The spelling of 68755631 in words is "sixty-eight million, seven hundred fifty-five thousand, six hundred thirty-one".