40947864869 has 4 divisors (see below), whose sum is σ = 40948397280. Its totient is φ = 40947332460.

The previous prime is 40947864847. The next prime is 40947864883. The reversal of 40947864869 is 96846874904.

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 not a de Polignac number, because 40947864869 - 2²⁰ = 40946816293 is a prime.

It is a super-2 number, since 2×40947864869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40947864809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126347 + ... + 312824.

It is an arithmetic number, because the mean of its divisors is an integer number (10237099320).

Almost surely, 2^40947864869 is an apocalyptic number.

It is an amenable number.

40947864869 is a deficient number, since it is larger than the sum of its proper divisors (532411).

40947864869 is an equidigital number, since it uses as much as digits as its factorization.

40947864869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532410.

The product of its (nonzero) digits is 83607552, while the sum is 65.

The spelling of 40947864869 in words is "forty billion, nine hundred forty-seven million, eight hundred sixty-four thousand, eight hundred sixty-nine".