40261591807 has 2 divisors, whose sum is σ = 40261591808. Its totient is φ = 40261591806.

The previous prime is 40261591789. The next prime is 40261591819. The reversal of 40261591807 is 70819516204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40261591807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40261591897) 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 as a sum of consecutive naturals, namely, 20130795903 + 20130795904.

It is an arithmetic number, because the mean of its divisors is an integer number (20130795904).

Almost surely, 2^40261591807 is an apocalyptic number.

40261591807 is a deficient number, since it is larger than the sum of its proper divisors (1).

40261591807 is an equidigital number, since it uses as much as digits as its factorization.

40261591807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 40261591807 in words is "forty billion, two hundred sixty-one million, five hundred ninety-one thousand, eight hundred seven".