40136159939 has 2 divisors, whose sum is σ = 40136159940. Its totient is φ = 40136159938.

The previous prime is 40136159909. The next prime is 40136159941. The reversal of 40136159939 is 93995163104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40136159939 is a prime.

It is a super-2 number, since 2×40136159939² (a number of 22 digits) contains 22 as substring.

Together with 40136159941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40136159909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20068079969 + 20068079970.

It is an arithmetic number, because the mean of its divisors is an integer number (20068079970).

Almost surely, 2^40136159939 is an apocalyptic number.

40136159939 is a deficient number, since it is larger than the sum of its proper divisors (1).

40136159939 is an equidigital number, since it uses as much as digits as its factorization.

40136159939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 50.

The spelling of 40136159939 in words is "forty billion, one hundred thirty-six million, one hundred fifty-nine thousand, nine hundred thirty-nine".