4148993561 has 2 divisors, whose sum is σ = 4148993562. Its totient is φ = 4148993560.

The previous prime is 4148993543. The next prime is 4148993567. The reversal of 4148993561 is 1653998414.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4144913161 + 4080400 = 64381^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 4148993561 - 2¹⁸ = 4148731417 is a prime.

It is not a weakly prime, because it can be changed into another prime (4148993567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2074496780 + 2074496781.

It is an arithmetic number, because the mean of its divisors is an integer number (2074496781).

Almost surely, 2^4148993561 is an apocalyptic number.

It is an amenable number.

4148993561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4148993561 is an equidigital number, since it uses as much as digits as its factorization.

4148993561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The square root of 4148993561 is about 64412.6816783776. The cubic root of 4148993561 is about 1606.8706573165.

The spelling of 4148993561 in words is "four billion, one hundred forty-eight million, nine hundred ninety-three thousand, five hundred sixty-one".