212608016778 has 32 divisors (see below), whose sum is σ = 431200602432. Its totient is φ = 69872630400.

The previous prime is 212608016773. The next prime is 212608016779. The reversal of 212608016778 is 877610806212.

It is not an unprimeable number, because it can be changed into a prime (212608016773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1112013 + ... + 1289103.

It is an arithmetic number, because the mean of its divisors is an integer number (13475018826).

Almost surely, 2^212608016778 is an apocalyptic number.

212608016778 is an abundant number, since it is smaller than the sum of its proper divisors (218592585654).

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

212608016778 is a wasteful number, since it uses less digits than its factorization.

212608016778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179910.

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 212608016778 in words is "two hundred twelve billion, six hundred eight million, sixteen thousand, seven hundred seventy-eight".