721580012 has 24 divisors (see below), whose sum is σ = 1320883200. Its totient is φ = 344261456.

The previous prime is 721580009. The next prime is 721580129. The reversal of 721580012 is 210085127.

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, 29189 + ... + 47907.

It is an arithmetic number, because the mean of its divisors is an integer number (55036800).

Almost surely, 2^721580012 is an apocalyptic number.

It is an amenable number.

721580012 is a deficient number, since it is larger than the sum of its proper divisors (599303188).

721580012 is a wasteful number, since it uses less digits than its factorization.

721580012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19165 (or 19163 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 721580012 is about 26862.2413807932. The cubic root of 721580012 is about 896.9360882152.

The spelling of 721580012 in words is "seven hundred twenty-one million, five hundred eighty thousand, twelve".