249931640828 has 6 divisors (see below), whose sum is σ = 437380371456. Its totient is φ = 124965820412.

The previous prime is 249931640773. The next prime is 249931640831. The reversal of 249931640828 is 828046139942.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31241455100 + ... + 31241455107.

It is an arithmetic number, because the mean of its divisors is an integer number (72896728576).

Almost surely, 2^249931640828 is an apocalyptic number.

It is an amenable number.

249931640828 is a deficient number, since it is larger than the sum of its proper divisors (187448730628).

249931640828 is a wasteful number, since it uses less digits than its factorization.

249931640828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62482910211 (or 62482910209 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 249931640828 in words is "two hundred forty-nine billion, nine hundred thirty-one million, six hundred forty thousand, eight hundred twenty-eight".