816214018 has 16 divisors (see below), whose sum is σ = 1289280960. Its totient is φ = 386779536.

The previous prime is 816213997. The next prime is 816214031. The reversal of 816214018 is 810412618.

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, 76380 + ... + 86407.

It is an arithmetic number, because the mean of its divisors is an integer number (80580060).

Almost surely, 2^816214018 is an apocalyptic number.

816214018 is a deficient number, since it is larger than the sum of its proper divisors (473066942).

816214018 is a wasteful number, since it uses less digits than its factorization.

816214018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162921.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 816214018 is about 28569.4595328648. The cubic root of 816214018 is about 934.5474348083.

The spelling of 816214018 in words is "eight hundred sixteen million, two hundred fourteen thousand, eighteen".