40991322690917 has 4 divisors (see below), whose sum is σ = 42099196277196. Its totient is φ = 39883449104640.

The previous prime is 40991322690883. The next prime is 40991322690949. The reversal of 40991322690917 is 71909622319904.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24704617699876 + 16286704991041 = 4970374^2 + 4035679^2 .

It is a cyclic number.

It is not a de Polignac number, because 40991322690917 - 2²² = 40991318496613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40991322690917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40991342690917) 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, 553936793084 + ... + 553936793157.

It is an arithmetic number, because the mean of its divisors is an integer number (10524799069299).

Almost surely, 2^{40991322690917} is an apocalyptic number.

It is an amenable number.

40991322690917 is a deficient number, since it is larger than the sum of its proper divisors (1107873586279).

40991322690917 is a wasteful number, since it uses less digits than its factorization.

40991322690917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107873586278.

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 40991322690917 in words is "forty trillion, nine hundred ninety-one billion, three hundred twenty-two million, six hundred ninety thousand, nine hundred seventeen".