8145533887 has 2 divisors, whose sum is σ = 8145533888. Its totient is φ = 8145533886.

The previous prime is 8145533863. The next prime is 8145533897. The reversal of 8145533887 is 7883355418.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8145533887 - 2¹⁹ = 8145009599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8145533827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4072766943 + 4072766944.

It is an arithmetic number, because the mean of its divisors is an integer number (4072766944).

Almost surely, 2^8145533887 is an apocalyptic number.

8145533887 is a deficient number, since it is larger than the sum of its proper divisors (1).

8145533887 is an equidigital number, since it uses as much as digits as its factorization.

8145533887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 52.

The square root of 8145533887 is about 90252.6115245426. The cubic root of 8145533887 is about 2012.0550162190.

The spelling of 8145533887 in words is "eight billion, one hundred forty-five million, five hundred thirty-three thousand, eight hundred eighty-seven".