210135531464641 has 4 divisors (see below), whose sum is σ = 210143407340484. Its totient is φ = 210127655588800.

The previous prime is 210135531464587. The next prime is 210135531464659. The reversal of 210135531464641 is 146464135531012.

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 648379248400 + 209487152216241 = 805220^2 + 14473671^2 .

It is a cyclic number.

It is not a de Polignac number, because 210135531464641 - 2³⁹ = 209585775650753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210135531464591 and 210135531464600.

It is not an unprimeable number, because it can be changed into a prime (210135531464681) 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, 3937897900 + ... + 3937951261.

It is an arithmetic number, because the mean of its divisors is an integer number (52535851835121).

Almost surely, 2^{210135531464641} is an apocalyptic number.

It is an amenable number.

210135531464641 is a deficient number, since it is larger than the sum of its proper divisors (7875875843).

210135531464641 is an equidigital number, since it uses as much as digits as its factorization.

210135531464641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875875842.

The product of its (nonzero) digits is 1036800, while the sum is 46.

Adding to 210135531464641 its reverse (146464135531012), we get a palindrome (356599666995653).

The spelling of 210135531464641 in words is "two hundred ten trillion, one hundred thirty-five billion, five hundred thirty-one million, four hundred sixty-four thousand, six hundred forty-one".