68500840490 has 8 divisors (see below), whose sum is σ = 123301512900. Its totient is φ = 27400336192.

The previous prime is 68500840483. The next prime is 68500840537. The reversal of 68500840490 is 9404800586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63709293649 + 4791546841 = 252407^2 + 69221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3425042015 + ... + 3425042034.

Almost surely, 2^68500840490 is an apocalyptic number.

68500840490 is a deficient number, since it is larger than the sum of its proper divisors (54800672410).

68500840490 is a wasteful number, since it uses less digits than its factorization.

68500840490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850084056.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 68500840490 in words is "sixty-eight billion, five hundred million, eight hundred forty thousand, four hundred ninety".