40561597802881 has 8 divisors (see below), whose sum is σ = 40821110595944. Its totient is φ = 40302099676800.

The previous prime is 40561597802879. The next prime is 40561597802909. The reversal of 40561597802881 is 18820879516504.

40561597802881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4964611600 + 40556633191281 = 70460^2 + 6368409^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40561597802881 - 2¹ = 40561597802879 is a prime.

It is a super-2 number, since 2×40561597802881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40561597805881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1908991 + ... + 9206923.

It is an arithmetic number, because the mean of its divisors is an integer number (5102638824493).

Almost surely, 2^{40561597802881} is an apocalyptic number.

It is an amenable number.

40561597802881 is a deficient number, since it is larger than the sum of its proper divisors (259512793063).

40561597802881 is a wasteful number, since it uses less digits than its factorization.

40561597802881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333491.

The product of its (nonzero) digits is 38707200, while the sum is 64.

The spelling of 40561597802881 in words is "forty trillion, five hundred sixty-one billion, five hundred ninety-seven million, eight hundred two thousand, eight hundred eighty-one".