816656440358 has 16 divisors (see below), whose sum is σ = 1337958930960. Its totient is φ = 370759687200.

The previous prime is 816656440351. The next prime is 816656440387. The reversal of 816656440358 is 853044656618.

It is a super-2 number, since 2×816656440358² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816656440351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22370633 + ... + 22407108.

It is an arithmetic number, because the mean of its divisors is an integer number (83622433185).

Almost surely, 2^816656440358 is an apocalyptic number.

816656440358 is a deficient number, since it is larger than the sum of its proper divisors (521302490602).

816656440358 is a wasteful number, since it uses less digits than its factorization.

816656440358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44778583.

The product of its (nonzero) digits is 16588800, while the sum is 56.

The spelling of 816656440358 in words is "eight hundred sixteen billion, six hundred fifty-six million, four hundred forty thousand, three hundred fifty-eight".