68643526 has 32 divisors (see below), whose sum is σ = 119927808. Its totient is φ = 28861920.

The previous prime is 68643521. The next prime is 68643529. The reversal of 68643526 is 62534686.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260871 + ... + 261133.

It is an arithmetic number, because the mean of its divisors is an integer number (3747744).

Almost surely, 2^68643526 is an apocalyptic number.

68643526 is a deficient number, since it is larger than the sum of its proper divisors (51284282).

68643526 is a wasteful number, since it uses less digits than its factorization.

68643526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its digits is 207360, while the sum is 40.

The square root of 68643526 is about 8285.1388642557. The cubic root of 68643526 is about 409.4490438180.

It can be divided in two parts, 68643 and 526, that added together give a square (69169 = 263²).

The spelling of 68643526 in words is "sixty-eight million, six hundred forty-three thousand, five hundred twenty-six".