10212544561 has 4 divisors (see below), whose sum is σ = 10564701300. Its totient is φ = 9860387824.

The previous prime is 10212544553. The next prime is 10212544633. The reversal of 10212544561 is 16544521201.

It is a happy number.

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 6182834161 + 4029710400 = 78631^2 + 63480^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212544561 - 2³ = 10212544553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212544501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176078326 + ... + 176078383.

It is an arithmetic number, because the mean of its divisors is an integer number (2641175325).

Almost surely, 2^10212544561 is an apocalyptic number.

It is an amenable number.

10212544561 is a deficient number, since it is larger than the sum of its proper divisors (352156739).

10212544561 is an equidigital number, since it uses as much as digits as its factorization.

10212544561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352156738.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 10212544561 in words is "ten billion, two hundred twelve million, five hundred forty-four thousand, five hundred sixty-one".