726196406621 has 24 divisors (see below), whose sum is σ = 856714541760. Its totient is φ = 613693608192.

The previous prime is 726196406591. The next prime is 726196406657. The reversal of 726196406621 is 126604691627.

726196406621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-726196406621 is a prime.

It is a super-2 number, since 2×726196406621² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 726196406621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726196400621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 959570 + ... + 1540508.

It is an arithmetic number, because the mean of its divisors is an integer number (35696439240).

Almost surely, 2^726196406621 is an apocalyptic number.

It is an amenable number.

726196406621 is a deficient number, since it is larger than the sum of its proper divisors (130518135139).

726196406621 is a wasteful number, since it uses less digits than its factorization.

726196406621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581313 (or 581306 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 726196406621 in words is "seven hundred twenty-six billion, one hundred ninety-six million, four hundred six thousand, six hundred twenty-one".