212905896786 has 36 divisors (see below), whose sum is σ = 507044489406. Its totient is φ = 64516937760.

The previous prime is 212905896767. The next prime is 212905896793. The reversal of 212905896786 is 687698509212.

212905896786 is a `hidden beast` number, since 21 + 29 + 0 + 589 + 6 + 7 + 8 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 178840181025 + 34065715761 = 422895^2 + 184569^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 48874291 + ... + 48878646.

Almost surely, 2^212905896786 is an apocalyptic number.

212905896786 is an abundant number, since it is smaller than the sum of its proper divisors (294138592620).

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

212905896786 is a wasteful number, since it uses less digits than its factorization.

212905896786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97752967 (or 97752953 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 212905896786 in words is "two hundred twelve billion, nine hundred five million, eight hundred ninety-six thousand, seven hundred eighty-six".