4100865491 has 2 divisors, whose sum is σ = 4100865492. Its totient is φ = 4100865490.

The previous prime is 4100865421. The next prime is 4100865497. The reversal of 4100865491 is 1945680014.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4100865491 - 2²⁶ = 4033756627 is a prime.

It is not a weakly prime, because it can be changed into another prime (4100865497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2050432745 + 2050432746.

It is an arithmetic number, because the mean of its divisors is an integer number (2050432746).

Almost surely, 2^4100865491 is an apocalyptic number.

4100865491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4100865491 is an equidigital number, since it uses as much as digits as its factorization.

4100865491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 4100865491 is about 64038.0003669696. Note that the first 3 decimals coincide. The cubic root of 4100865491 is about 1600.6332767912.

The spelling of 4100865491 in words is "four billion, one hundred million, eight hundred sixty-five thousand, four hundred ninety-one".