809461497523 has 4 divisors (see below), whose sum is σ = 925098854320. Its totient is φ = 693824140728.

The previous prime is 809461497521. The next prime is 809461497629. The reversal of 809461497523 is 325794164908.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 809461497523 - 2¹ = 809461497521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809461497521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57818678388 + ... + 57818678401.

It is an arithmetic number, because the mean of its divisors is an integer number (231274713580).

It is a 1-persistent number, because it is pandigital, but 2⋅809461497523 = 1618922995046 is not.

Almost surely, 2^809461497523 is an apocalyptic number.

809461497523 is a deficient number, since it is larger than the sum of its proper divisors (115637356797).

809461497523 is a wasteful number, since it uses less digits than its factorization.

809461497523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115637356796.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 809461497523 in words is "eight hundred nine billion, four hundred sixty-one million, four hundred ninety-seven thousand, five hundred twenty-three".