68643315 has 32 divisors (see below), whose sum is σ = 131423040. Its totient is φ = 33792768.

The previous prime is 68643301. The next prime is 68643317. The reversal of 68643315 is 51334686.

68643315 is a `hidden beast` number, since 6 + 8 + 643 + 3 + 1 + 5 = 666.

It is not a de Polignac number, because 68643315 - 2⁹ = 68642803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68643315.

It is not an unprimeable number, because it can be changed into a prime (68643317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17802 + ... + 21311.

It is an arithmetic number, because the mean of its divisors is an integer number (4106970).

Almost surely, 2^68643315 is an apocalyptic number.

68643315 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68643315 is a deficient number, since it is larger than the sum of its proper divisors (62779725).

68643315 is a wasteful number, since it uses less digits than its factorization.

68643315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39140 (or 39134 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 68643315 is about 8285.1261306030. The cubic root of 68643315 is about 409.4486242890.

The spelling of 68643315 in words is "sixty-eight million, six hundred forty-three thousand, three hundred fifteen".