68732643 has 24 divisors (see below), whose sum is σ = 109495632. Its totient is φ = 38211264.

The previous prime is 68732623. The next prime is 68732647. The reversal of 68732643 is 34623786.

It is a de Polignac number, because none of the positive numbers 2^k-68732643 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (68732647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 880 + ... + 11757.

It is an arithmetic number, because the mean of its divisors is an integer number (4562318).

Almost surely, 2^68732643 is an apocalyptic number.

68732643 is a deficient number, since it is larger than the sum of its proper divisors (40762989).

68732643 is a wasteful number, since it uses less digits than its factorization.

68732643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12691 (or 12684 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 68732643 is about 8290.5152433368. The cubic root of 68732643 is about 409.6261573458.

The spelling of 68732643 in words is "sixty-eight million, seven hundred thirty-two thousand, six hundred forty-three".