813478889700 has 54 divisors (see below), whose sum is σ = 2549804389314. Its totient is φ = 216927703680.

The previous prime is 813478889653. The next prime is 813478889719. The reversal of 813478889700 is 7988874318.

813478889700 is a `hidden beast` number, since 8 + 13 + 478 + 8 + 89 + 70 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 192348907776 + 621129981924 = 438576^2 + 788118^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 451931817 + ... + 451933616.

Almost surely, 2^813478889700 is an apocalyptic number.

It is an amenable number.

813478889700 is an abundant number, since it is smaller than the sum of its proper divisors (1736325499614).

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

813478889700 is a wasteful number, since it uses less digits than its factorization.

813478889700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903865453 (or 903865443 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 813478889700 in words is "eight hundred thirteen billion, four hundred seventy-eight million, eight hundred eighty-nine thousand, seven hundred".