68991450305 has 32 divisors (see below), whose sum is σ = 86574071808. Its totient is φ = 52719667200.

The previous prime is 68991450289. The next prime is 68991450329. The reversal of 68991450305 is 50305419986.

It is a happy number.

It is not a de Polignac number, because 68991450305 - 2⁴ = 68991450289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5752415 + ... + 5764395.

It is an arithmetic number, because the mean of its divisors is an integer number (2705439744).

Almost surely, 2^68991450305 is an apocalyptic number.

It is an amenable number.

68991450305 is a deficient number, since it is larger than the sum of its proper divisors (17582621503).

68991450305 is a wasteful number, since it uses less digits than its factorization.

68991450305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12497.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 68991450305 in words is "sixty-eight billion, nine hundred ninety-one million, four hundred fifty thousand, three hundred five".