249466642891 has 8 divisors (see below), whose sum is σ = 257711627264. Its totient is φ = 241234013160.

The previous prime is 249466642889. The next prime is 249466642897. The reversal of 249466642891 is 198246664942.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249466642891 - 2¹ = 249466642889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249466642897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3047601 + ... + 3128386.

It is an arithmetic number, because the mean of its divisors is an integer number (32213953408).

Almost surely, 2^249466642891 is an apocalyptic number.

249466642891 is a deficient number, since it is larger than the sum of its proper divisors (8244984373).

249466642891 is a wasteful number, since it uses less digits than its factorization.

249466642891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177321.

The product of its digits is 35831808, while the sum is 61.

The spelling of 249466642891 in words is "two hundred forty-nine billion, four hundred sixty-six million, six hundred forty-two thousand, eight hundred ninety-one".