10644743525561 has 4 divisors (see below), whose sum is σ = 10644945385872. Its totient is φ = 10644541665252.

The previous prime is 10644743525543. The next prime is 10644743525593. The reversal of 10644743525561 is 16552534744601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10644743525561 - 2⁶ = 10644743525497 is a prime.

It is a super-2 number, since 2×10644743525561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10644743525531) 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, 100851035 + ... + 100956528.

It is an arithmetic number, because the mean of its divisors is an integer number (2661236346468).

Almost surely, 2^{10644743525561} is an apocalyptic number.

It is an amenable number.

10644743525561 is a deficient number, since it is larger than the sum of its proper divisors (201860311).

10644743525561 is an equidigital number, since it uses as much as digits as its factorization.

10644743525561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201860310.

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 10644743525561 in words is "ten trillion, six hundred forty-four billion, seven hundred forty-three million, five hundred twenty-five thousand, five hundred sixty-one".