212664235265 has 4 divisors (see below), whose sum is σ = 255197082324. Its totient is φ = 170131388208.

The previous prime is 212664235237. The next prime is 212664235321. The reversal of 212664235265 is 562532466212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99182164624 + 113482070641 = 314932^2 + 336871^2 .

It is a cyclic number.

It is not a de Polignac number, because 212664235265 - 2²² = 212660040961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21266423522 + ... + 21266423531.

It is an arithmetic number, because the mean of its divisors is an integer number (63799270581).

Almost surely, 2^212664235265 is an apocalyptic number.

It is an amenable number.

212664235265 is a deficient number, since it is larger than the sum of its proper divisors (42532847059).

212664235265 is an equidigital number, since it uses as much as digits as its factorization.

212664235265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42532847058.

The product of its digits is 1036800, while the sum is 44.

The spelling of 212664235265 in words is "two hundred twelve billion, six hundred sixty-four million, two hundred thirty-five thousand, two hundred sixty-five".