726321722516 has 24 divisors (see below), whose sum is σ = 1372250690664. Its totient is φ = 334389427200.

The previous prime is 726321722513. The next prime is 726321722603. The reversal of 726321722516 is 615227123627.

It can be written as a sum of positive squares in 4 ways, for example, as 126347546116 + 599974176400 = 355454^2 + 774580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726321722513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17395265 + ... + 17436968.

It is an arithmetic number, because the mean of its divisors is an integer number (57177112111).

Almost surely, 2^726321722516 is an apocalyptic number.

It is an amenable number.

726321722516 is a deficient number, since it is larger than the sum of its proper divisors (645928968148).

726321722516 is a wasteful number, since it uses less digits than its factorization.

726321722516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34832651 (or 34832649 counting only the distinct ones).

The product of its digits is 423360, while the sum is 44.

The spelling of 726321722516 in words is "seven hundred twenty-six billion, three hundred twenty-one million, seven hundred twenty-two thousand, five hundred sixteen".