818120620799 has 4 divisors (see below), whose sum is σ = 818441329200. Its totient is φ = 817799912400.

The previous prime is 818120620789. The next prime is 818120620813. The reversal of 818120620799 is 997026021818.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 818120620799 - 2⁸ = 818120620543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 818120620799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818120620789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160350374 + ... + 160355475.

It is an arithmetic number, because the mean of its divisors is an integer number (204610332300).

Almost surely, 2^818120620799 is an apocalyptic number.

818120620799 is a deficient number, since it is larger than the sum of its proper divisors (320708401).

818120620799 is a wasteful number, since it uses less digits than its factorization.

818120620799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320708400.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 818120620799 in words is "eight hundred eighteen billion, one hundred twenty million, six hundred twenty thousand, seven hundred ninety-nine".