249031091896 has 8 divisors (see below), whose sum is σ = 466933297320. Its totient is φ = 124515545944.

The previous prime is 249031091809. The next prime is 249031091921. The reversal of 249031091896 is 698190130942.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 15564443236 + ... + 15564443251.

It is an arithmetic number, because the mean of its divisors is an integer number (58366662165).

Almost surely, 2^249031091896 is an apocalyptic number.

It is an amenable number.

249031091896 is a deficient number, since it is larger than the sum of its proper divisors (217902205424).

249031091896 is a wasteful number, since it uses less digits than its factorization.

249031091896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31128886493 (or 31128886489 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 249031091896 in words is "two hundred forty-nine billion, thirty-one million, ninety-one thousand, eight hundred ninety-six".