40866264809 has 4 divisors (see below), whose sum is σ = 40868621904. Its totient is φ = 40863907716.

The previous prime is 40866264799. The next prime is 40866264811. The reversal of 40866264809 is 90846266804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40866264809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40866264899) 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 3 ways as a sum of consecutive naturals, for example, 1152347 + ... + 1187280.

It is an arithmetic number, because the mean of its divisors is an integer number (10217155476).

Almost surely, 2^40866264809 is an apocalyptic number.

It is an amenable number.

40866264809 is a deficient number, since it is larger than the sum of its proper divisors (2357095).

40866264809 is a wasteful number, since it uses less digits than its factorization.

40866264809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357094.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 40866264809 in words is "forty billion, eight hundred sixty-six million, two hundred sixty-four thousand, eight hundred nine".