809691046250 has 80 divisors (see below), whose sum is σ = 1540046027520. Its totient is φ = 319121400000.

The previous prime is 809691046247. The next prime is 809691046261. The reversal of 809691046250 is 52640196908.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 49663100 + ... + 49679400.

It is an arithmetic number, because the mean of its divisors is an integer number (19250575344).

Almost surely, 2^809691046250 is an apocalyptic number.

809691046250 is a deficient number, since it is larger than the sum of its proper divisors (730354981270).

809691046250 is a wasteful number, since it uses less digits than its factorization.

809691046250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16905 (or 16890 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 809691046250 in words is "eight hundred nine billion, six hundred ninety-one million, forty-six thousand, two hundred fifty".