249544986420 has 24 divisors (see below), whose sum is σ = 698725962144. Its totient is φ = 66545329696.

The previous prime is 249544986389. The next prime is 249544986421. The reversal of 249544986420 is 24689445942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249544986421) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2079541494 + ... + 2079541613.

It is an arithmetic number, because the mean of its divisors is an integer number (29113581756).

Almost surely, 2^249544986420 is an apocalyptic number.

249544986420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249544986420 is an abundant number, since it is smaller than the sum of its proper divisors (449180975724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249544986420 is a wasteful number, since it uses less digits than its factorization.

249544986420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159083119 (or 4159083117 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 249544986420 in words is "two hundred forty-nine billion, five hundred forty-four million, nine hundred eighty-six thousand, four hundred twenty".