10326512561 has 4 divisors (see below), whose sum is σ = 10775491392. Its totient is φ = 9877533732.

The previous prime is 10326512557. The next prime is 10326512563. The reversal of 10326512561 is 16521562301.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16521562301 = 2309 ⋅7155289.

It is a cyclic number.

It is not a de Polignac number, because 10326512561 - 2² = 10326512557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10326512563) 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, 224489381 + ... + 224489426.

It is an arithmetic number, because the mean of its divisors is an integer number (2693872848).

Almost surely, 2^10326512561 is an apocalyptic number.

It is an amenable number.

10326512561 is a deficient number, since it is larger than the sum of its proper divisors (448978831).

10326512561 is an equidigital number, since it uses as much as digits as its factorization.

10326512561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448978830.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 10326512561 in words is "ten billion, three hundred twenty-six million, five hundred twelve thousand, five hundred sixty-one".