212504663641 has 4 divisors (see below), whose sum is σ = 212578019892. Its totient is φ = 212431307392.

The previous prime is 212504663611. The next prime is 212504663647. The reversal of 212504663641 is 146366405212.

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 85266920025 + 127237743616 = 292005^2 + 356704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212504663641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212504663594 and 212504663603.

It is not an unprimeable number, because it can be changed into a prime (212504663647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36673780 + ... + 36679573.

It is an arithmetic number, because the mean of its divisors is an integer number (53144504973).

Almost surely, 2^212504663641 is an apocalyptic number.

It is an amenable number.

212504663641 is a deficient number, since it is larger than the sum of its proper divisors (73356251).

212504663641 is an equidigital number, since it uses as much as digits as its factorization.

212504663641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73356250.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 212504663641 in words is "two hundred twelve billion, five hundred four million, six hundred sixty-three thousand, six hundred forty-one".