818818831457 has 8 divisors (see below), whose sum is σ = 932094164160. Its totient is φ = 712016374960.

The previous prime is 818818831447. The next prime is 818818831477. The reversal of 818818831457 is 754138818818.

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

It is not a de Polignac number, because 818818831457 - 2¹⁸ = 818818569313 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 818818831457.

It is not an unprimeable number, because it can be changed into a prime (818818831447) 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, 1618218782 + ... + 1618219287.

It is an arithmetic number, because the mean of its divisors is an integer number (116511770520).

Almost surely, 2^818818831457 is an apocalyptic number.

It is an amenable number.

818818831457 is a deficient number, since it is larger than the sum of its proper divisors (113275332703).

818818831457 is a wasteful number, since it uses less digits than its factorization.

818818831457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236438103.

The product of its digits is 13762560, while the sum is 62.

The spelling of 818818831457 in words is "eight hundred eighteen billion, eight hundred eighteen million, eight hundred thirty-one thousand, four hundred fifty-seven".