818104258457 has 4 divisors (see below), whose sum is σ = 819193612416. Its totient is φ = 817014904500.

The previous prime is 818104258427. The next prime is 818104258469. The reversal of 818104258457 is 754852401818.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 818104258457 - 2⁸ = 818104258201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 818104258399 and 818104258408.

It is not an unprimeable number, because it can be changed into a prime (818104258427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544675853 + ... + 544677354.

It is an arithmetic number, because the mean of its divisors is an integer number (204798403104).

Almost surely, 2^818104258457 is an apocalyptic number.

It is an amenable number.

818104258457 is a deficient number, since it is larger than the sum of its proper divisors (1089353959).

818104258457 is a wasteful number, since it uses less digits than its factorization.

818104258457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089353958.

The product of its (nonzero) digits is 2867200, while the sum is 53.

The spelling of 818104258457 in words is "eight hundred eighteen billion, one hundred four million, two hundred fifty-eight thousand, four hundred fifty-seven".