40872826323781 has 2 divisors, whose sum is σ = 40872826323782. Its totient is φ = 40872826323780.

The previous prime is 40872826323773. The next prime is 40872826323803. The reversal of 40872826323781 is 18732362827804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35019528352900 + 5853297970881 = 5917730^2 + 2419359^2 .

It is a cyclic number.

It is not a de Polignac number, because 40872826323781 - 2³ = 40872826323773 is a prime.

It is a super-2 number, since 2×40872826323781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40872826323181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20436413161890 + 20436413161891.

It is an arithmetic number, because the mean of its divisors is an integer number (20436413161891).

Almost surely, 2^{40872826323781} is an apocalyptic number.

It is an amenable number.

40872826323781 is a deficient number, since it is larger than the sum of its proper divisors (1).

40872826323781 is an equidigital number, since it uses as much as digits as its factorization.

40872826323781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43352064, while the sum is 61.

The spelling of 40872826323781 in words is "forty trillion, eight hundred seventy-two billion, eight hundred twenty-six million, three hundred twenty-three thousand, seven hundred eighty-one".