211245582360385 has 4 divisors (see below), whose sum is σ = 253494698832468. Its totient is φ = 168996465888304.

The previous prime is 211245582360287. The next prime is 211245582360419. The reversal of 211245582360385 is 583063285542112.

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 96806786833936 + 114438795526449 = 9839044^2 + 10697607^2 .

It is a cyclic number.

It is not a de Polignac number, because 211245582360385 - 2¹⁵ = 211245582327617 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, 21124558236034 + ... + 21124558236043.

It is an arithmetic number, because the mean of its divisors is an integer number (63373674708117).

Almost surely, 2^{211245582360385} is an apocalyptic number.

It is an amenable number.

211245582360385 is a deficient number, since it is larger than the sum of its proper divisors (42249116472083).

211245582360385 is an equidigital number, since it uses as much as digits as its factorization.

211245582360385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42249116472082.

The product of its (nonzero) digits is 13824000, while the sum is 55.

The spelling of 211245582360385 in words is "two hundred eleven trillion, two hundred forty-five billion, five hundred eighty-two million, three hundred sixty thousand, three hundred eighty-five".