40065617237 has 2 divisors, whose sum is σ = 40065617238. Its totient is φ = 40065617236.

The previous prime is 40065617231. The next prime is 40065617239. The reversal of 40065617237 is 73271656004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28929247396 + 11136369841 = 170086^2 + 105529^2 .

It is a cyclic number.

It is not a de Polignac number, because 40065617237 - 2²⁶ = 39998508373 is a prime.

Together with 40065617239, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40065617194 and 40065617203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40065617231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20032808618 + 20032808619.

It is an arithmetic number, because the mean of its divisors is an integer number (20032808619).

Almost surely, 2^40065617237 is an apocalyptic number.

It is an amenable number.

40065617237 is a deficient number, since it is larger than the sum of its proper divisors (1).

40065617237 is an equidigital number, since it uses as much as digits as its factorization.

40065617237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 40065617237 in words is "forty billion, sixty-five million, six hundred seventeen thousand, two hundred thirty-seven".