809812758545 has 8 divisors (see below), whose sum is σ = 1110600354624. Its totient is φ = 555300177264.

The previous prime is 809812758511. The next prime is 809812758563. The reversal of 809812758545 is 545857218908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 809812758545 - 2²⁰ = 809811709969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11568753659 + ... + 11568753728.

It is an arithmetic number, because the mean of its divisors is an integer number (138825044328).

Almost surely, 2^809812758545 is an apocalyptic number.

It is an amenable number.

809812758545 is a deficient number, since it is larger than the sum of its proper divisors (300787596079).

809812758545 is a wasteful number, since it uses less digits than its factorization.

809812758545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23137507399.

The product of its (nonzero) digits is 32256000, while the sum is 62.

The spelling of 809812758545 in words is "eight hundred nine billion, eight hundred twelve million, seven hundred fifty-eight thousand, five hundred forty-five".