68881945 has 8 divisors (see below), whose sum is σ = 90172800. Its totient is φ = 50095920.

The previous prime is 68881933. The next prime is 68881961. The reversal of 68881945 is 54918886.

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

It is not a de Polignac number, because 68881945 - 2¹⁵ = 68849177 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 626145 + ... + 626254.

It is an arithmetic number, because the mean of its divisors is an integer number (11271600).

Almost surely, 2^68881945 is an apocalyptic number.

It is an amenable number.

68881945 is a deficient number, since it is larger than the sum of its proper divisors (21290855).

68881945 is a wasteful number, since it uses less digits than its factorization.

68881945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252415.

The product of its digits is 552960, while the sum is 49.

The square root of 68881945 is about 8299.5147448511. The cubic root of 68881945 is about 409.9225413854.

The spelling of 68881945 in words is "sixty-eight million, eight hundred eighty-one thousand, nine hundred forty-five".