7985611541 has 2 divisors, whose sum is σ = 7985611542. Its totient is φ = 7985611540.

The previous prime is 7985611507. The next prime is 7985611553. The reversal of 7985611541 is 1451165897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5423733316 + 2561878225 = 73646^2 + 50615^2 .

It is a cyclic number.

It is not a de Polignac number, because 7985611541 - 2²² = 7981417237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7985641541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992805770 + 3992805771.

It is an arithmetic number, because the mean of its divisors is an integer number (3992805771).

Almost surely, 2^7985611541 is an apocalyptic number.

It is an amenable number.

7985611541 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985611541 is an equidigital number, since it uses as much as digits as its factorization.

7985611541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 47.

The square root of 7985611541 is about 89362.2489701328. The cubic root of 7985611541 is about 1998.8002421845.

The spelling of 7985611541 in words is "seven billion, nine hundred eighty-five million, six hundred eleven thousand, five hundred forty-one".