212740750646645 has 8 divisors (see below), whose sum is σ = 274926508528056. Its totient is φ = 157100862015936.

The previous prime is 212740750646617. The next prime is 212740750646713. The reversal of 212740750646645 is 546646057047212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2880735636529 + 209860015010116 = 1697273^2 + 14486546^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212740750646645 - 2¹⁶ = 212740750581109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1636467312602 + ... + 1636467312731.

It is an arithmetic number, because the mean of its divisors is an integer number (34365813566007).

Almost surely, 2^{212740750646645} is an apocalyptic number.

It is an amenable number.

212740750646645 is a deficient number, since it is larger than the sum of its proper divisors (62185757881411).

212740750646645 is a wasteful number, since it uses less digits than its factorization.

212740750646645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272934625351.

The product of its (nonzero) digits is 67737600, while the sum is 59.

The spelling of 212740750646645 in words is "two hundred twelve trillion, seven hundred forty billion, seven hundred fifty million, six hundred forty-six thousand, six hundred forty-five".