68649513026 has 16 divisors (see below), whose sum is σ = 103324072824. Its totient is φ = 34208208384.

The previous prime is 68649513017. The next prime is 68649513041. The reversal of 68649513026 is 62031594686.

It can be written as a sum of positive squares in 4 ways, for example, as 20841253225 + 47808259801 = 144365^2 + 218651^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3256496 + ... + 3277508.

Almost surely, 2^68649513026 is an apocalyptic number.

68649513026 is a deficient number, since it is larger than the sum of its proper divisors (34674559798).

68649513026 is a wasteful number, since it uses less digits than its factorization.

68649513026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26485.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 68649513026 in words is "sixty-eight billion, six hundred forty-nine million, five hundred thirteen thousand, twenty-six".