40245176007581 has 2 divisors, whose sum is σ = 40245176007582. Its totient is φ = 40245176007580.

The previous prime is 40245176007557. The next prime is 40245176007583. The reversal of 40245176007581 is 18570067154204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22028848380100 + 18216327627481 = 4693490^2 + 4268059^2 .

It is a cyclic number.

It is not a de Polignac number, because 40245176007581 - 2²⁶ = 40245108898717 is a prime.

It is a super-2 number, since 2×40245176007581² (a number of 28 digits) contains 22 as substring.

Together with 40245176007583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40245176007583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20122588003790 + 20122588003791.

It is an arithmetic number, because the mean of its divisors is an integer number (20122588003791).

Almost surely, 2^{40245176007581} is an apocalyptic number.

It is an amenable number.

40245176007581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40245176007581 is an equidigital number, since it uses as much as digits as its factorization.

40245176007581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 40245176007581 in words is "forty trillion, two hundred forty-five billion, one hundred seventy-six million, seven thousand, five hundred eighty-one".