4145556391 has 2 divisors, whose sum is σ = 4145556392. Its totient is φ = 4145556390.

The previous prime is 4145556329. The next prime is 4145556451. The reversal of 4145556391 is 1936555414.

4145556391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4145556391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4145556991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2072778195 + 2072778196.

It is an arithmetic number, because the mean of its divisors is an integer number (2072778196).

Almost surely, 2^4145556391 is an apocalyptic number.

4145556391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4145556391 is an equidigital number, since it uses as much as digits as its factorization.

4145556391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 43.

The square root of 4145556391 is about 64385.9953017735. The cubic root of 4145556391 is about 1606.4268056201.

The spelling of 4145556391 in words is "four billion, one hundred forty-five million, five hundred fifty-six thousand, three hundred ninety-one".