726641253 has 16 divisors (see below), whose sum is σ = 1159314240. Its totient is φ = 447163632.

The previous prime is 726641233. The next prime is 726641257. The reversal of 726641253 is 352146627.

726641253 is a `hidden beast` number, since 7 + 2 + 6 + 641 + 2 + 5 + 3 = 666.

It is not a de Polignac number, because 726641253 - 2¹⁸ = 726379109 is a prime.

It is a super-2 number, since 2×726641253² = 1056015021122820018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726641257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1034751 + ... + 1035452.

It is an arithmetic number, because the mean of its divisors is an integer number (72457140).

Almost surely, 2^726641253 is an apocalyptic number.

It is an amenable number.

726641253 is a deficient number, since it is larger than the sum of its proper divisors (432672987).

726641253 is a wasteful number, since it uses less digits than its factorization.

726641253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070225 (or 2070219 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 726641253 is about 26956.2841096469. The cubic root of 726641253 is about 899.0282734303.

The spelling of 726641253 in words is "seven hundred twenty-six million, six hundred forty-one thousand, two hundred fifty-three".