818077917889 has 32 divisors (see below), whose sum is σ = 865563148800. Its totient is φ = 772310702592.

The previous prime is 818077917887. The next prime is 818077917893. The reversal of 818077917889 is 988719770818.

It is a cyclic number.

It is not a de Polignac number, because 818077917889 - 2¹ = 818077917887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818077917887) 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, 65163637 + ... + 65176189.

It is an arithmetic number, because the mean of its divisors is an integer number (27048848400).

Almost surely, 2^818077917889 is an apocalyptic number.

It is an amenable number.

818077917889 is a deficient number, since it is larger than the sum of its proper divisors (47485230911).

818077917889 is a wasteful number, since it uses less digits than its factorization.

818077917889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13009.

The product of its (nonzero) digits is 113799168, while the sum is 73.

The spelling of 818077917889 in words is "eight hundred eighteen billion, seventy-seven million, nine hundred seventeen thousand, eight hundred eighty-nine".