40999999865 has 16 divisors (see below), whose sum is σ = 53683741440. Its totient is φ = 29812062720.

The previous prime is 40999999861. The next prime is 40999999891. The reversal of 40999999865 is 56899999904.

It is not a de Polignac number, because 40999999865 - 2² = 40999999861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40999999861) 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 in 15 ways as a sum of consecutive naturals, for example, 203177 + ... + 351113.

It is an arithmetic number, because the mean of its divisors is an integer number (3355233840).

Almost surely, 2^40999999865 is an apocalyptic number.

It is an amenable number.

40999999865 is a deficient number, since it is larger than the sum of its proper divisors (12683741575).

40999999865 is a wasteful number, since it uses less digits than its factorization.

40999999865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152992.

The product of its (nonzero) digits is 510183360, while the sum is 77.

The spelling of 40999999865 in words is "forty billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred sixty-five".