9010011561 has 4 divisors (see below), whose sum is σ = 12013348752. Its totient is φ = 6006674372.

The previous prime is 9010011557. The next prime is 9010011581. The reversal of 9010011561 is 1651100109.

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 9010011561 - 2² = 9010011557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9010011581) 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, 1501668591 + ... + 1501668596.

It is an arithmetic number, because the mean of its divisors is an integer number (3003337188).

Almost surely, 2^9010011561 is an apocalyptic number.

It is an amenable number.

9010011561 is a deficient number, since it is larger than the sum of its proper divisors (3003337191).

9010011561 is a wasteful number, since it uses less digits than its factorization.

9010011561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003337190.

The product of its (nonzero) digits is 270, while the sum is 24.

The square root of 9010011561 is about 94921.0806986520. The cubic root of 9010011561 is about 2080.8548293116.

The spelling of 9010011561 in words is "nine billion, ten million, eleven thousand, five hundred sixty-one".