818959138653 has 8 divisors (see below), whose sum is σ = 1110453069600. Its totient is φ = 536718983408.

The previous prime is 818959138649. The next prime is 818959138687. The reversal of 818959138653 is 356831959818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 818959138653 - 2² = 818959138649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818959138693) 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, 2313443718 + ... + 2313444071.

It is an arithmetic number, because the mean of its divisors is an integer number (138806633700).

Almost surely, 2^818959138653 is an apocalyptic number.

It is an amenable number.

818959138653 is a deficient number, since it is larger than the sum of its proper divisors (291493930947).

818959138653 is a wasteful number, since it uses less digits than its factorization.

818959138653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626887851.

The product of its digits is 55987200, while the sum is 66.

The spelling of 818959138653 in words is "eight hundred eighteen billion, nine hundred fifty-nine million, one hundred thirty-eight thousand, six hundred fifty-three".