818395993805472 has 120 divisors (see below), whose sum is σ = 2406983048471232. Its totient is φ = 272786971881600.

The previous prime is 818395993805461. The next prime is 818395993805521. The reversal of 818395993805472 is 274508399593818.

818395993805472 is a `hidden beast` number, since 8 + 1 + 8 + 3 + 9 + 59 + 93 + 8 + 0 + 5 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 818395993805391 and 818395993805400.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53822697 + ... + 67332567.

Almost surely, 2^{818395993805472} is an apocalyptic number.

It is an amenable number.

818395993805472 is an abundant number, since it is smaller than the sum of its proper divisors (1588587054665760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

818395993805472 is a wasteful number, since it uses less digits than its factorization.

818395993805472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13533264 (or 13533247 counting only the distinct ones).

The product of its (nonzero) digits is 4702924800, while the sum is 81.

The spelling of 818395993805472 in words is "eight hundred eighteen trillion, three hundred ninety-five billion, nine hundred ninety-three million, eight hundred five thousand, four hundred seventy-two".