40310445781 has 4 divisors (see below), whose sum is σ = 42681648492. Its totient is φ = 37939243072.

The previous prime is 40310445739. The next prime is 40310445793. The reversal of 40310445781 is 18754401304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10738140625 + 29572305156 = 103625^2 + 171966^2 .

It is a cyclic number.

It is not a de Polignac number, because 40310445781 - 2¹³ = 40310437589 is a prime.

It is a super-2 number, since 2×40310445781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40310445781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40310445181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185601330 + ... + 1185601363.

It is an arithmetic number, because the mean of its divisors is an integer number (10670412123).

Almost surely, 2^40310445781 is an apocalyptic number.

It is an amenable number.

40310445781 is a deficient number, since it is larger than the sum of its proper divisors (2371202711).

40310445781 is a wasteful number, since it uses less digits than its factorization.

40310445781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371202710.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 40310445781 in words is "forty billion, three hundred ten million, four hundred forty-five thousand, seven hundred eighty-one".