10550257561 has 4 divisors (see below), whose sum is σ = 10795612432. Its totient is φ = 10304902692.

The previous prime is 10550257541. The next prime is 10550257607. The reversal of 10550257561 is 16575205501.

10550257561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 16575205501 = 181 ⋅91575721.

It is a cyclic number.

It is not a de Polignac number, because 10550257561 - 2⁹ = 10550257049 is a prime.

It is a super-2 number, since 2×10550257561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10550257561.

It is not an unprimeable number, because it can be changed into a prime (10550257541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122677371 + ... + 122677456.

It is an arithmetic number, because the mean of its divisors is an integer number (2698903108).

Almost surely, 2^10550257561 is an apocalyptic number.

It is an amenable number.

10550257561 is a deficient number, since it is larger than the sum of its proper divisors (245354871).

10550257561 is an equidigital number, since it uses as much as digits as its factorization.

10550257561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245354870.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 10550257561 in words is "ten billion, five hundred fifty million, two hundred fifty-seven thousand, five hundred sixty-one".