726996739673 has 4 divisors (see below), whose sum is σ = 730116897588. Its totient is φ = 723876581760.

The previous prime is 726996739663. The next prime is 726996739691. The reversal of 726996739673 is 376937699627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 286992704089 + 440004035584 = 535717^2 + 663328^2 .

It is a cyclic number.

It is not a de Polignac number, because 726996739673 - 2⁴ = 726996739657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726996739673.

It is not an unprimeable number, because it can be changed into a prime (726996739633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560078608 + ... + 1560079073.

It is an arithmetic number, because the mean of its divisors is an integer number (182529224397).

Almost surely, 2^726996739673 is an apocalyptic number.

It is an amenable number.

726996739673 is a deficient number, since it is larger than the sum of its proper divisors (3120157915).

726996739673 is a wasteful number, since it uses less digits than its factorization.

726996739673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120157914.

The product of its digits is 972182736, while the sum is 74.

The spelling of 726996739673 in words is "seven hundred twenty-six billion, nine hundred ninety-six million, seven hundred thirty-nine thousand, six hundred seventy-three".