40115564999 has 2 divisors, whose sum is σ = 40115565000. Its totient is φ = 40115564998.

The previous prime is 40115564987. The next prime is 40115565001. The reversal of 40115564999 is 99946551104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40115564999 is a prime.

Together with 40115565001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40115564999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40115564959) 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, 20057782499 + 20057782500.

It is an arithmetic number, because the mean of its divisors is an integer number (20057782500).

Almost surely, 2^40115564999 is an apocalyptic number.

40115564999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40115564999 is an equidigital number, since it uses as much as digits as its factorization.

40115564999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1749600, while the sum is 53.

The spelling of 40115564999 in words is "forty billion, one hundred fifteen million, five hundred sixty-four thousand, nine hundred ninety-nine".