10001561611 has 2 divisors, whose sum is σ = 10001561612. Its totient is φ = 10001561610.

The previous prime is 10001561593. The next prime is 10001561617. The reversal of 10001561611 is 11616510001.

It is a strong prime.

It is an emirp because it is prime and its reverse (11616510001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10001561611 - 2⁷ = 10001561483 is a prime.

It is not a weakly prime, because it can be changed into another prime (10001561617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000780805 + 5000780806.

It is an arithmetic number, because the mean of its divisors is an integer number (5000780806).

Almost surely, 2^10001561611 is an apocalyptic number.

10001561611 is a deficient number, since it is larger than the sum of its proper divisors (1).

10001561611 is an equidigital number, since it uses as much as digits as its factorization.

10001561611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 22.

The spelling of 10001561611 in words is "ten billion, one million, five hundred sixty-one thousand, six hundred eleven".