812985454064 has 20 divisors (see below), whose sum is σ = 1800182077104. Its totient is φ = 348422337408.

The previous prime is 812985454049. The next prime is 812985454097. The reversal of 812985454064 is 460454589218.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3629399237 + ... + 3629399460.

Almost surely, 2^812985454064 is an apocalyptic number.

It is an amenable number.

812985454064 is an abundant number, since it is smaller than the sum of its proper divisors (987196623040).

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

812985454064 is a wasteful number, since it uses less digits than its factorization.

812985454064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7258798712 (or 7258798706 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 56.

The spelling of 812985454064 in words is "eight hundred twelve billion, nine hundred eighty-five million, four hundred fifty-four thousand, sixty-four".