726655281 has 16 divisors (see below), whose sum is σ = 1076898240. Its totient is φ = 432086720.

The previous prime is 726655271. The next prime is 726655331. The reversal of 726655281 is 182556627.

It is a cyclic number.

It is not a de Polignac number, because 726655281 - 2⁵ = 726655249 is a prime.

It is a super-2 number, since 2×726655281² = 1056055794810377922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (726655211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205986 + ... + 209483.

It is an arithmetic number, because the mean of its divisors is an integer number (67306140).

Almost surely, 2^726655281 is an apocalyptic number.

It is an amenable number.

726655281 is a deficient number, since it is larger than the sum of its proper divisors (350242959).

726655281 is a wasteful number, since it uses less digits than its factorization.

726655281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415536.

The product of its digits is 201600, while the sum is 42.

The square root of 726655281 is about 26956.5443074590. The cubic root of 726655281 is about 899.0340587187.

The spelling of 726655281 in words is "seven hundred twenty-six million, six hundred fifty-five thousand, two hundred eighty-one".