212659642764 has 36 divisors (see below), whose sum is σ = 538803588960. Its totient is φ = 70722072480.

The previous prime is 212659642753. The next prime is 212659642829. The reversal of 212659642764 is 467246956212.

212659642764 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 596 + 42 + 7 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 212659642764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6837399 + ... + 6868430.

It is an arithmetic number, because the mean of its divisors is an integer number (14966766360).

Almost surely, 2^212659642764 is an apocalyptic number.

It is an amenable number.

212659642764 is an abundant number, since it is smaller than the sum of its proper divisors (326143946196).

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

212659642764 is a wasteful number, since it uses less digits than its factorization.

212659642764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13706270 (or 13706265 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 212659642764 in words is "two hundred twelve billion, six hundred fifty-nine million, six hundred forty-two thousand, seven hundred sixty-four".