249984344691 has 8 divisors (see below), whose sum is σ = 370347177360. Its totient is φ = 166656229776.

The previous prime is 249984344609. The next prime is 249984344711. The reversal of 249984344691 is 196443489942.

249984344691 is a `hidden beast` number, since 2 + 4 + 99 + 84 + 3 + 4 + 469 + 1 = 666.

249984344691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-249984344691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249984342691) 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 7 ways as a sum of consecutive naturals, for example, 4629339690 + ... + 4629339743.

It is an arithmetic number, because the mean of its divisors is an integer number (46293397170).

Almost surely, 2^249984344691 is an apocalyptic number.

249984344691 is a deficient number, since it is larger than the sum of its proper divisors (120362832669).

249984344691 is an equidigital number, since it uses as much as digits as its factorization.

249984344691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9258679442 (or 9258679436 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 63.

The spelling of 249984344691 in words is "two hundred forty-nine billion, nine hundred eighty-four million, three hundred forty-four thousand, six hundred ninety-one".