40305726281 has 8 divisors (see below), whose sum is σ = 40780211400. Its totient is φ = 39831721600.

The previous prime is 40305726257. The next prime is 40305726313. The reversal of 40305726281 is 18262750304.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3866352400 + 36439373881 = 62180^2 + 190891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40305726281 is a prime.

It is a super-2 number, since 2×40305726281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40305726781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50075 + ... + 288303.

It is an arithmetic number, because the mean of its divisors is an integer number (5097526425).

Almost surely, 2^40305726281 is an apocalyptic number.

It is an amenable number.

40305726281 is a deficient number, since it is larger than the sum of its proper divisors (474485119).

40305726281 is a wasteful number, since it uses less digits than its factorization.

40305726281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240219.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 40305726281 in words is "forty billion, three hundred five million, seven hundred twenty-six thousand, two hundred eighty-one".