726345081 has 36 divisors (see below), whose sum is σ = 1331416944. Its totient is φ = 377319600.

The previous prime is 726345073. The next prime is 726345127. The reversal of 726345081 is 180543627.

726345081 is a `hidden beast` number, since 72 + 63 + 450 + 81 = 666.

It is not a de Polignac number, because 726345081 - 2³ = 726345073 is a prime.

It is a super-2 number, since 2×726345081² = 1055154353385793122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (726345041) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70015 + ... + 79716.

It is an arithmetic number, because the mean of its divisors is an integer number (36983804).

Almost surely, 2^726345081 is an apocalyptic number.

It is an amenable number.

726345081 is a deficient number, since it is larger than the sum of its proper divisors (605071863).

726345081 is a wasteful number, since it uses less digits than its factorization.

726345081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149762 (or 149752 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 726345081 is about 26950.7899884215. The cubic root of 726345081 is about 898.9061117332.

The spelling of 726345081 in words is "seven hundred twenty-six million, three hundred forty-five thousand, eighty-one".