40681109431 has 2 divisors, whose sum is σ = 40681109432. Its totient is φ = 40681109430.

The previous prime is 40681109407. The next prime is 40681109449. The reversal of 40681109431 is 13490118604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40681109431 - 2²⁷ = 40546891703 is a prime.

It is a super-2 number, since 2×40681109431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40681109731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20340554715 + 20340554716.

It is an arithmetic number, because the mean of its divisors is an integer number (20340554716).

Almost surely, 2^40681109431 is an apocalyptic number.

40681109431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40681109431 is an equidigital number, since it uses as much as digits as its factorization.

40681109431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 40681109431 in words is "forty billion, six hundred eighty-one million, one hundred nine thousand, four hundred thirty-one".