726651403441 has 4 divisors (see below), whose sum is σ = 726654685300. Its totient is φ = 726648121584.

The previous prime is 726651403397. The next prime is 726651403447. The reversal of 726651403441 is 144304156627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 144304156627 = 8573 ⋅16832399.

It can be written as a sum of positive squares in 2 ways, for example, as 38421880225 + 688229523216 = 196015^2 + 829596^2 .

It is a cyclic number.

It is not a de Polignac number, because 726651403441 - 2¹⁵ = 726651370673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726651403447) 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, 1282746 + ... + 1760323.

It is an arithmetic number, because the mean of its divisors is an integer number (181663671325).

Almost surely, 2^726651403441 is an apocalyptic number.

It is an amenable number.

726651403441 is a deficient number, since it is larger than the sum of its proper divisors (3281859).

726651403441 is a wasteful number, since it uses less digits than its factorization.

726651403441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281858.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 726651403441 in words is "seven hundred twenty-six billion, six hundred fifty-one million, four hundred three thousand, four hundred forty-one".