721700316198 has 12 divisors (see below), whose sum is σ = 1563684018468. Its totient is φ = 240566772060.

The previous prime is 721700316179. The next prime is 721700316203. The reversal of 721700316198 is 891613007127.

721700316198 is a `hidden beast` number, since 7 + 21 + 7 + 0 + 0 + 3 + 1 + 619 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20047230988 + ... + 20047231023.

It is an arithmetic number, because the mean of its divisors is an integer number (130307001539).

Almost surely, 2^721700316198 is an apocalyptic number.

721700316198 is an abundant number, since it is smaller than the sum of its proper divisors (841983702270).

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

721700316198 is a wasteful number, since it uses less digits than its factorization.

721700316198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40094462019 (or 40094462016 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 721700316198 in words is "seven hundred twenty-one billion, seven hundred million, three hundred sixteen thousand, one hundred ninety-eight".