726148081 has 16 divisors (see below), whose sum is σ = 802731600. Its totient is φ = 653764608.

The previous prime is 726148067. The next prime is 726148091. The reversal of 726148081 is 180841627.

It can be written as a sum of positive squares in 8 ways, for example, as 53523856 + 672624225 = 7316^2 + 25935^2 .

It is a cyclic number.

It is not a de Polignac number, because 726148081 - 2⁷ = 726147953 is a prime.

It is a super-2 number, since 2×726148081² = 1054582071079965122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 726148081.

It is not an unprimeable number, because it can be changed into a prime (726148091) 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, 46981 + ... + 60493.

It is an arithmetic number, because the mean of its divisors is an integer number (50170725).

Almost surely, 2^726148081 is an apocalyptic number.

It is an amenable number.

726148081 is a deficient number, since it is larger than the sum of its proper divisors (76583519).

726148081 is a wasteful number, since it uses less digits than its factorization.

726148081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13668.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 726148081 is about 26947.1349311944. The cubic root of 726148081 is about 898.8248369963.

The spelling of 726148081 in words is "seven hundred twenty-six million, one hundred forty-eight thousand, eighty-one".