990486522871 has 2 divisors, whose sum is σ = 990486522872. Its totient is φ = 990486522870.

The previous prime is 990486522863. The next prime is 990486522889. The reversal of 990486522871 is 178225684099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990486522871 - 2³ = 990486522863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990486525871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495243261435 + 495243261436.

It is an arithmetic number, because the mean of its divisors is an integer number (495243261436).

Almost surely, 2^990486522871 is an apocalyptic number.

990486522871 is a deficient number, since it is larger than the sum of its proper divisors (1).

990486522871 is an equidigital number, since it uses as much as digits as its factorization.

990486522871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 990486522871 in words is "nine hundred ninety billion, four hundred eighty-six million, five hundred twenty-two thousand, eight hundred seventy-one".