812557747854 has 40 divisors (see below), whose sum is σ = 1831901439720. Its totient is φ = 269190901584.

The previous prime is 812557747849. The next prime is 812557747909. The reversal of 812557747854 is 458747755218.

812557747854 is a `hidden beast` number, since 8 + 1 + 2 + 5 + 577 + 4 + 7 + 8 + 54 = 666.

812557747854 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 812557747791 and 812557747800.

It is a congruent number.

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, 15359449 + ... + 15412260.

It is an arithmetic number, because the mean of its divisors is an integer number (45797535993).

Almost surely, 2^812557747854 is an apocalyptic number.

812557747854 is an abundant number, since it is smaller than the sum of its proper divisors (1019343691866).

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

812557747854 is a wasteful number, since it uses less digits than its factorization.

812557747854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30771886 (or 30771877 counting only the distinct ones).

The product of its digits is 87808000, while the sum is 63.

The spelling of 812557747854 in words is "eight hundred twelve billion, five hundred fifty-seven million, seven hundred forty-seven thousand, eight hundred fifty-four".