721600516 has 48 divisors (see below), whose sum is σ = 1604377600. Its totient is φ = 276255360.

The previous prime is 721600507. The next prime is 721600553. The reversal of 721600516 is 615006127.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 20691 + ... + 43258.

Almost surely, 2^721600516 is an apocalyptic number.

It is an amenable number.

721600516 is an abundant number, since it is smaller than the sum of its proper divisors (882777084).

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

721600516 is a wasteful number, since it uses less digits than its factorization.

721600516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64004 (or 64002 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 721600516 is about 26862.6230290342. The cubic root of 721600516 is about 896.9445837403.

The spelling of 721600516 in words is "seven hundred twenty-one million, six hundred thousand, five hundred sixteen".