805870138018 has 16 divisors (see below), whose sum is σ = 1318760565984. Its totient is φ = 366286836960.

The previous prime is 805870138013. The next prime is 805870138027. The reversal of 805870138018 is 810831078508.

805870138018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (805870138013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419280 + ... + 1336987.

It is an arithmetic number, because the mean of its divisors is an integer number (82422535374).

Almost surely, 2^805870138018 is an apocalyptic number.

805870138018 is a deficient number, since it is larger than the sum of its proper divisors (512890427966).

805870138018 is a wasteful number, since it uses less digits than its factorization.

805870138018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777137.

The product of its (nonzero) digits is 430080, while the sum is 49.

The spelling of 805870138018 in words is "eight hundred five billion, eight hundred seventy million, one hundred thirty-eight thousand, eighteen".