40161719747 has 2 divisors, whose sum is σ = 40161719748. Its totient is φ = 40161719746.

The previous prime is 40161719701. The next prime is 40161719753. The reversal of 40161719747 is 74791716104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40161719747 - 2¹² = 40161715651 is a prime.

It is a super-2 number, since 2×40161719747² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40161719777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080859873 + 20080859874.

It is an arithmetic number, because the mean of its divisors is an integer number (20080859874).

Almost surely, 2^40161719747 is an apocalyptic number.

40161719747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161719747 is an equidigital number, since it uses as much as digits as its factorization.

40161719747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 47.

The spelling of 40161719747 in words is "forty billion, one hundred sixty-one million, seven hundred nineteen thousand, seven hundred forty-seven".