40159851617 has 2 divisors, whose sum is σ = 40159851618. Its totient is φ = 40159851616.

The previous prime is 40159851583. The next prime is 40159851629. The reversal of 40159851617 is 71615895104.

40159851617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40159759201 + 92416 = 200399^2 + 304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40159851617 is a prime.

It is a super-2 number, since 2×40159851617² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40159851647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20079925808 + 20079925809.

It is an arithmetic number, because the mean of its divisors is an integer number (20079925809).

Almost surely, 2^40159851617 is an apocalyptic number.

It is an amenable number.

40159851617 is a deficient number, since it is larger than the sum of its proper divisors (1).

40159851617 is an equidigital number, since it uses as much as digits as its factorization.

40159851617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 40159851617 in words is "forty billion, one hundred fifty-nine million, eight hundred fifty-one thousand, six hundred seventeen".