808365891042 has 64 divisors (see below), whose sum is σ = 1860139728000. Its totient is φ = 259907909184.

The previous prime is 808365891041. The next prime is 808365891079. The reversal of 808365891042 is 240198563808.

808365891042 is a `hidden beast` number, since 8 + 0 + 8 + 3 + 6 + 589 + 10 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 808365891042.

It is not an unprimeable number, because it can be changed into a prime (808365891041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1342468 + ... + 1849040.

It is an arithmetic number, because the mean of its divisors is an integer number (29064683250).

Almost surely, 2^808365891042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 808365891042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930069864000).

808365891042 is an abundant number, since it is smaller than the sum of its proper divisors (1051773836958).

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

808365891042 is a wasteful number, since it uses less digits than its factorization.

808365891042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507632 (or 507626 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 808365891042 in words is "eight hundred eight billion, three hundred sixty-five million, eight hundred ninety-one thousand, forty-two".