68043915 has 64 divisors (see below), whose sum is σ = 127180800. Its totient is φ = 34473600.

The previous prime is 68043907. The next prime is 68043917. The reversal of 68043915 is 51934086.

It is not a de Polignac number, because 68043915 - 2³ = 68043907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68043915.

It is not an unprimeable number, because it can be changed into a prime (68043917) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 297021 + ... + 297249.

It is an arithmetic number, because the mean of its divisors is an integer number (1987200).

Almost surely, 2^68043915 is an apocalyptic number.

68043915 is a deficient number, since it is larger than the sum of its proper divisors (59136885).

68043915 is a wasteful number, since it uses less digits than its factorization.

68043915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 68043915 is about 8248.8735594625. The cubic root of 68043915 is about 408.2533569130.

The spelling of 68043915 in words is "sixty-eight million, forty-three thousand, nine hundred fifteen".