816166955822 has 8 divisors (see below), whose sum is σ = 1224260870616. Its totient is φ = 408079998952.

The previous prime is 816166955819. The next prime is 816166955893. The reversal of 816166955822 is 228559661618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×816166955822² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435613 + ... + 1921800.

It is an arithmetic number, because the mean of its divisors is an integer number (153032608827).

Almost surely, 2^816166955822 is an apocalyptic number.

816166955822 is a deficient number, since it is larger than the sum of its proper divisors (408093914794).

816166955822 is a wasteful number, since it uses less digits than its factorization.

816166955822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478962.

The product of its digits is 12441600, while the sum is 59.

The spelling of 816166955822 in words is "eight hundred sixteen billion, one hundred sixty-six million, nine hundred fifty-five thousand, eight hundred twenty-two".