900075712561 has 2 divisors, whose sum is σ = 900075712562. Its totient is φ = 900075712560.

The previous prime is 900075712507. The next prime is 900075712643. The reversal of 900075712561 is 165217570009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619753115536 + 280322597025 = 787244^2 + 529455^2 .

It is a cyclic number.

It is not a de Polignac number, because 900075712561 - 2⁹ = 900075712049 is a prime.

It is not a weakly prime, because it can be changed into another prime (900075752561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450037856280 + 450037856281.

It is an arithmetic number, because the mean of its divisors is an integer number (450037856281).

Almost surely, 2^900075712561 is an apocalyptic number.

It is an amenable number.

900075712561 is a deficient number, since it is larger than the sum of its proper divisors (1).

900075712561 is an equidigital number, since it uses as much as digits as its factorization.

900075712561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 43.

The spelling of 900075712561 in words is "nine hundred billion, seventy-five million, seven hundred twelve thousand, five hundred sixty-one".