726552081 has 6 divisors (see below), whose sum is σ = 1049464130. Its totient is φ = 484368048.

The previous prime is 726552059. The next prime is 726552097. The reversal of 726552081 is 180255627.

It is a happy number.

726552081 is a `hidden beast` number, since 7 + 26 + 552 + 0 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 407393856 + 319158225 = 20184^2 + 17865^2 .

It is not a de Polignac number, because 726552081 - 2¹⁷ = 726421009 is a prime.

It is a super-2 number, since 2×726552081² = 1055755852810861122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726552181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40363996 + ... + 40364013.

Almost surely, 2^726552081 is an apocalyptic number.

It is an amenable number.

726552081 is a deficient number, since it is larger than the sum of its proper divisors (322912049).

726552081 is a wasteful number, since it uses less digits than its factorization.

726552081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80728015 (or 80728012 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 726552081 is about 26954.6300475447. The cubic root of 726552081 is about 898.9914962594.

The spelling of 726552081 in words is "seven hundred twenty-six million, five hundred fifty-two thousand, eighty-one".