249999999896 has 8 divisors (see below), whose sum is σ = 468749999820. Its totient is φ = 124999999944.

The previous prime is 249999999871. The next prime is 249999999911. The reversal of 249999999896 is 698999999942.

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15624999986 + ... + 15625000001.

Almost surely, 2^249999999896 is an apocalyptic number.

It is an amenable number.

249999999896 is a deficient number, since it is larger than the sum of its proper divisors (218749999924).

249999999896 is a wasteful number, since it uses less digits than its factorization.

249999999896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31249999993 (or 31249999989 counting only the distinct ones).

The product of its digits is 16529940864, while the sum is 92.

The spelling of 249999999896 in words is "two hundred forty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred ninety-six".