10000610561 has 4 divisors (see below), whose sum is σ = 10004377092. Its totient is φ = 9996844032.

The previous prime is 10000610539. The next prime is 10000610567. The reversal of 10000610561 is 16501600001.

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 3854050561 + 6146560000 = 62081^2 + 78400^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000610561 - 2¹⁰ = 10000609537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10000610567) 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, 1879280 + ... + 1884593.

It is an arithmetic number, because the mean of its divisors is an integer number (2501094273).

Almost surely, 2^10000610561 is an apocalyptic number.

It is an amenable number.

10000610561 is a deficient number, since it is larger than the sum of its proper divisors (3766531).

10000610561 is an equidigital number, since it uses as much as digits as its factorization.

10000610561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766530.

The product of its (nonzero) digits is 180, while the sum is 20.

The spelling of 10000610561 in words is "ten billion, six hundred ten thousand, five hundred sixty-one".