818239748572 has 24 divisors (see below), whose sum is σ = 1516909587984. Its totient is φ = 384861119232.

The previous prime is 818239748561. The next prime is 818239748593. The reversal of 818239748572 is 275847932818.

It is a super-2 number, since 2×818239748572² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2876958 + ... + 3148549.

It is an arithmetic number, because the mean of its divisors is an integer number (63204566166).

Almost surely, 2^818239748572 is an apocalyptic number.

It is an amenable number.

818239748572 is a deficient number, since it is larger than the sum of its proper divisors (698669839412).

818239748572 is a wasteful number, since it uses less digits than its factorization.

818239748572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6027525 (or 6027523 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 64.

The spelling of 818239748572 in words is "eight hundred eighteen billion, two hundred thirty-nine million, seven hundred forty-eight thousand, five hundred seventy-two".