212064451236 has 144 divisors (see below), whose sum is σ = 631251653760. Its totient is φ = 59348298240.

The previous prime is 212064451229. The next prime is 212064451243. The reversal of 212064451236 is 632154460212.

212064451236 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 644 + 5 + 1 + 2 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (212064451229) and next prime (212064451243).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 212064451236.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137305 + ... + 665568.

It is an arithmetic number, because the mean of its divisors is an integer number (4383692040).

Almost surely, 2^212064451236 is an apocalyptic number.

It is an amenable number.

212064451236 is an abundant number, since it is smaller than the sum of its proper divisors (419187202524).

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

212064451236 is a wasteful number, since it uses less digits than its factorization.

212064451236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802946 (or 802941 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 212064451236 in words is "two hundred twelve billion, sixty-four million, four hundred fifty-one thousand, two hundred thirty-six".