816801886 has 16 divisors (see below), whose sum is σ = 1241178624. Its totient is φ = 403098624.

The previous prime is 816801871. The next prime is 816801893. The reversal of 816801886 is 688108618.

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, 68806 + ... + 79798.

It is an arithmetic number, because the mean of its divisors is an integer number (77573664).

Almost surely, 2^816801886 is an apocalyptic number.

816801886 is a deficient number, since it is larger than the sum of its proper divisors (424376738).

816801886 is a wasteful number, since it uses less digits than its factorization.

816801886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11475.

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 816801886 is about 28579.7460800477. The cubic root of 816801886 is about 934.7717463552.

The spelling of 816801886 in words is "eight hundred sixteen million, eight hundred one thousand, eight hundred eighty-six".