726646451 has 4 divisors (see below), whose sum is σ = 726700392. Its totient is φ = 726592512.

The previous prime is 726646411. The next prime is 726646489. The reversal of 726646451 is 154646627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 154646627 = 619 ⋅249833.

It is a cyclic number.

It is not a de Polignac number, because 726646451 - 2²⁶ = 659537587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 726646399 and 726646408.

It is not an unprimeable number, because it can be changed into a prime (726646411) 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, 12200 + ... + 40026.

It is an arithmetic number, because the mean of its divisors is an integer number (181675098).

Almost surely, 2^726646451 is an apocalyptic number.

726646451 is a deficient number, since it is larger than the sum of its proper divisors (53941).

726646451 is a wasteful number, since it uses less digits than its factorization.

726646451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53940.

The product of its digits is 241920, while the sum is 41.

The square root of 726646451 is about 26956.3805248405. The cubic root of 726646451 is about 899.0304171465.

The spelling of 726646451 in words is "seven hundred twenty-six million, six hundred forty-six thousand, four hundred fifty-one".