549372073691 has 16 divisors (see below), whose sum is σ = 643580391168. Its totient is φ = 459133768800.

The previous prime is 549372073651. The next prime is 549372073697. The reversal of 549372073691 is 196370273945.

It is not a de Polignac number, because 549372073691 - 2²⁶ = 549304964827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549372073697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1426340 + ... + 1770081.

It is an arithmetic number, because the mean of its divisors is an integer number (40223774448).

Almost surely, 2^549372073691 is an apocalyptic number.

549372073691 is a deficient number, since it is larger than the sum of its proper divisors (94208317477).

549372073691 is a wasteful number, since it uses less digits than its factorization.

549372073691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197042.

The product of its (nonzero) digits is 8573040, while the sum is 56.

The spelling of 549372073691 in words is "five hundred forty-nine billion, three hundred seventy-two million, seventy-three thousand, six hundred ninety-one".