212540974289565 has 32 divisors (see below), whose sum is σ = 340439058504576. Its totient is φ = 113230696550400.

The previous prime is 212540974289537. The next prime is 212540974289569. The reversal of 212540974289565 is 565982479045212.

It is not a de Polignac number, because 212540974289565 - 2¹⁴ = 212540974273181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212540974289565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212540974289569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349039365 + ... + 349647765.

It is an arithmetic number, because the mean of its divisors is an integer number (10638720578268).

Almost surely, 2^{212540974289565} is an apocalyptic number.

It is an amenable number.

212540974289565 is a deficient number, since it is larger than the sum of its proper divisors (127898084215011).

212540974289565 is a wasteful number, since it uses less digits than its factorization.

212540974289565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633949.

The product of its (nonzero) digits is 435456000, while the sum is 69.

The spelling of 212540974289565 in words is "two hundred twelve trillion, five hundred forty billion, nine hundred seventy-four million, two hundred eighty-nine thousand, five hundred sixty-five".