720724126730 has 8 divisors (see below), whose sum is σ = 1297303428132. Its totient is φ = 288289650688.

The previous prime is 720724126723. The next prime is 720724126753. The reversal of 720724126730 is 37621427027.

It can be written as a sum of positive squares in 2 ways, for example, as 720629512201 + 94614529 = 848899^2 + 9727^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×720724126730² (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 3 ways as a sum of consecutive naturals, for example, 36036206327 + ... + 36036206346.

Almost surely, 2^720724126730 is an apocalyptic number.

720724126730 is a deficient number, since it is larger than the sum of its proper divisors (576579301402).

720724126730 is a wasteful number, since it uses less digits than its factorization.

720724126730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72072412680.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 720724126730 in words is "seven hundred twenty billion, seven hundred twenty-four million, one hundred twenty-six thousand, seven hundred thirty".