721302457899 has 16 divisors (see below), whose sum is σ = 1018328764320. Its totient is φ = 452573306880.

The previous prime is 721302457849. The next prime is 721302457943. The reversal of 721302457899 is 998754203127.

It is a happy number.

It is not a de Polignac number, because 721302457899 - 2⁸ = 721302457643 is a prime.

It is a super-2 number, since 2×721302457899² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721302457829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3538639 + ... + 3736919.

It is an arithmetic number, because the mean of its divisors is an integer number (63645547770).

Almost surely, 2^721302457899 is an apocalyptic number.

721302457899 is a deficient number, since it is larger than the sum of its proper divisors (297026306421).

721302457899 is a wasteful number, since it uses less digits than its factorization.

721302457899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269630.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 721302457899 in words is "seven hundred twenty-one billion, three hundred two million, four hundred fifty-seven thousand, eight hundred ninety-nine".