212361650645 has 16 divisors (see below), whose sum is σ = 255921120000. Its totient is φ = 169165923648.

The previous prime is 212361650621. The next prime is 212361650647. The reversal of 212361650645 is 546056163212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212361650645 - 2⁶ = 212361650581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212361650647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170026 + ... + 1339284.

It is an arithmetic number, because the mean of its divisors is an integer number (15995070000).

Almost surely, 2^212361650645 is an apocalyptic number.

It is an amenable number.

212361650645 is a deficient number, since it is larger than the sum of its proper divisors (43559469355).

212361650645 is a wasteful number, since it uses less digits than its factorization.

212361650645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170332.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 212361650645 in words is "two hundred twelve billion, three hundred sixty-one million, six hundred fifty thousand, six hundred forty-five".