10061611561 has 4 divisors (see below), whose sum is σ = 10064646400. Its totient is φ = 10058576724.

The previous prime is 10061611559. The next prime is 10061611589. The reversal of 10061611561 is 16511616001.

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 10061611561 - 2¹ = 10061611559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10061611591) 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, 1512441 + ... + 1519078.

It is an arithmetic number, because the mean of its divisors is an integer number (2516161600).

Almost surely, 2^10061611561 is an apocalyptic number.

It is an amenable number.

10061611561 is a deficient number, since it is larger than the sum of its proper divisors (3034839).

10061611561 is an equidigital number, since it uses as much as digits as its factorization.

10061611561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034838.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 10061611561 in words is "ten billion, sixty-one million, six hundred eleven thousand, five hundred sixty-one".