68686263523 has 4 divisors (see below), whose sum is σ = 68687896648. Its totient is φ = 68684630400.

The previous prime is 68686263517. The next prime is 68686263553. The reversal of 68686263523 is 32536268686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68686263523 - 2⁵ = 68686263491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68686263553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751761 + ... + 838162.

It is an arithmetic number, because the mean of its divisors is an integer number (17171974162).

Almost surely, 2^68686263523 is an apocalyptic number.

68686263523 is a deficient number, since it is larger than the sum of its proper divisors (1633125).

68686263523 is a wasteful number, since it uses less digits than its factorization.

68686263523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633124.

The product of its digits is 14929920, while the sum is 55.

The spelling of 68686263523 in words is "sixty-eight billion, six hundred eighty-six million, two hundred sixty-three thousand, five hundred twenty-three".