84397776212 has 12 divisors (see below), whose sum is σ = 147698391456. Its totient is φ = 42198235800.

The previous prime is 84397776181. The next prime is 84397776251. The reversal of 84397776212 is 21267779348.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 237203 + ... + 474405.

It is an arithmetic number, because the mean of its divisors is an integer number (12308199288).

Almost surely, 2^84397776212 is an apocalyptic number.

84397776212 is the 237203-rd pentagonal number.

It is an amenable number.

84397776212 is a deficient number, since it is larger than the sum of its proper divisors (63300615244).

84397776212 is a wasteful number, since it uses less digits than its factorization.

84397776212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326158 (or 326156 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 56.

The spelling of 84397776212 in words is "eighty-four billion, three hundred ninety-seven million, seven hundred seventy-six thousand, two hundred twelve".