809757920097 has 12 divisors (see below), whose sum is σ = 1336743233280. Its totient is φ = 462718811448.

The previous prime is 809757920063. The next prime is 809757920117. The reversal of 809757920097 is 790029757908.

It is not a de Polignac number, because 809757920097 - 2⁷ = 809757919969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 12853300319 = 809757920097 / (8 + 0 + 9 + 7 + 5 + 7 + 9 + 2 + 0 + 0 + 9 + 7).

It is not an unprimeable number, because it can be changed into a prime (809757920057) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6426650097 + ... + 6426650222.

It is an arithmetic number, because the mean of its divisors is an integer number (111395269440).

Almost surely, 2^809757920097 is an apocalyptic number.

It is an amenable number.

809757920097 is a deficient number, since it is larger than the sum of its proper divisors (526985313183).

809757920097 is a wasteful number, since it uses less digits than its factorization.

809757920097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12853300332 (or 12853300329 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 63.

The spelling of 809757920097 in words is "eight hundred nine billion, seven hundred fifty-seven million, nine hundred twenty thousand, ninety-seven".