809680534 has 16 divisors (see below), whose sum is σ = 1321433568. Its totient is φ = 369844992.

The previous prime is 809680519. The next prime is 809680561. The reversal of 809680534 is 435086908.

It is a nialpdrome in base 13.

It is a congruent 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, 158002 + ... + 163045.

It is an arithmetic number, because the mean of its divisors is an integer number (82589598).

Almost surely, 2^809680534 is an apocalyptic number.

809680534 is a deficient number, since it is larger than the sum of its proper divisors (511753034).

809680534 is a wasteful number, since it uses less digits than its factorization.

809680534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321159.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 809680534 is about 28454.8859424880. The cubic root of 809680534 is about 932.0471856540.

The spelling of 809680534 in words is "eight hundred nine million, six hundred eighty thousand, five hundred thirty-four".