721980359690 has 16 divisors (see below), whose sum is σ = 1299582621792. Its totient is φ = 288788149584.

The previous prime is 721980359687. The next prime is 721980359707. The reversal of 721980359690 is 96953089127.

It is a super-2 number, since 2×721980359690² (a number of 25 digits) contains 22 as substring.

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, 324617 + ... + 1244723.

It is an arithmetic number, because the mean of its divisors is an integer number (81223913862).

Almost surely, 2^721980359690 is an apocalyptic number.

721980359690 is a deficient number, since it is larger than the sum of its proper divisors (577602262102).

721980359690 is a wasteful number, since it uses less digits than its factorization.

721980359690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998581.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The spelling of 721980359690 in words is "seven hundred twenty-one billion, nine hundred eighty million, three hundred fifty-nine thousand, six hundred ninety".