68149702290 has 32 divisors (see below), whose sum is σ = 163580924160. Its totient is φ = 18170849664.

The previous prime is 68149702217. The next prime is 68149702319. The reversal of 68149702290 is 9220794186.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86382 + ... + 379158.

It is an arithmetic number, because the mean of its divisors is an integer number (5111903880).

Almost surely, 2^68149702290 is an apocalyptic number.

68149702290 is an abundant number, since it is smaller than the sum of its proper divisors (95431221870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68149702290 is a wasteful number, since it uses less digits than its factorization.

68149702290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300546.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 68149702290 in words is "sixty-eight billion, one hundred forty-nine million, seven hundred two thousand, two hundred ninety".