809964479645 has 16 divisors (see below), whose sum is σ = 1023246840000. Its totient is φ = 613787528448.

The previous prime is 809964479627. The next prime is 809964479677. The reversal of 809964479645 is 546974469908.

809964479645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 809964479645 - 2¹⁰ = 809964478621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177701 + ... + 1285109.

It is an arithmetic number, because the mean of its divisors is an integer number (63952927500).

Almost surely, 2^809964479645 is an apocalyptic number.

It is an amenable number.

809964479645 is a deficient number, since it is larger than the sum of its proper divisors (213282360355).

809964479645 is a wasteful number, since it uses less digits than its factorization.

809964479645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115132.

The product of its (nonzero) digits is 470292480, while the sum is 71.

The spelling of 809964479645 in words is "eight hundred nine billion, nine hundred sixty-four million, four hundred seventy-nine thousand, six hundred forty-five".