816101568 has 70 divisors (see below), whose sum is σ = 2419196076. Its totient is φ = 272032128.

The previous prime is 816101551. The next prime is 816101569. The reversal of 816101568 is 865101618.

816101568 is a `hidden beast` number, since 81 + 6 + 10 + 1 + 568 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (816101569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 73530 + ... + 83897.

Almost surely, 2^816101568 is an apocalyptic number.

It is an amenable number.

816101568 is an abundant number, since it is smaller than the sum of its proper divisors (1603094508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816101568 is a wasteful number, since it uses less digits than its factorization.

816101568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157451 (or 157432 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 816101568 is about 28567.4914544487. The cubic root of 816101568 is about 934.5045152296.

Subtracting 816101568 from its reverse (865101618), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 816101568 in words is "eight hundred sixteen million, one hundred one thousand, five hundred sixty-eight".