721354016 has 12 divisors (see below), whose sum is σ = 1420165782. Its totient is φ = 360676992.

The previous prime is 721354003. The next prime is 721354021. The reversal of 721354016 is 610453127.

It can be written as a sum of positive squares in only one way, i.e., 552250000 + 169104016 = 23500^2 + 13004^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 721354016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11271125 + ... + 11271188.

Almost surely, 2^721354016 is an apocalyptic number.

It is an amenable number.

721354016 is a deficient number, since it is larger than the sum of its proper divisors (698811766).

721354016 is a wasteful number, since it uses less digits than its factorization.

721354016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22542323 (or 22542315 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 721354016 is about 26858.0344776009. The cubic root of 721354016 is about 896.8424394950.

The spelling of 721354016 in words is "seven hundred twenty-one million, three hundred fifty-four thousand, sixteen".