816809295 has 16 divisors (see below), whose sum is σ = 1337288832. Its totient is φ = 425500320.

The previous prime is 816809291. The next prime is 816809303. The reversal of 816809295 is 592908618.

It is a happy number.

It is not a de Polignac number, because 816809295 - 2² = 816809291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816809291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632541 + ... + 633830.

It is an arithmetic number, because the mean of its divisors is an integer number (83580552).

Almost surely, 2^816809295 is an apocalyptic number.

816809295 is a deficient number, since it is larger than the sum of its proper divisors (520479537).

816809295 is a wasteful number, since it uses less digits than its factorization.

816809295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266422.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 816809295 is about 28579.8756995198. The cubic root of 816809295 is about 934.7745727048.

The spelling of 816809295 in words is "eight hundred sixteen million, eight hundred nine thousand, two hundred ninety-five".