99815528563 has 2 divisors, whose sum is σ = 99815528564. Its totient is φ = 99815528562.

The previous prime is 99815528551. The next prime is 99815528599. The reversal of 99815528563 is 36582551899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99815528563 - 2⁹ = 99815528051 is a prime.

It is a super-2 number, since 2×99815528563² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99815228563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49907764281 + 49907764282.

It is an arithmetic number, because the mean of its divisors is an integer number (49907764282).

Almost surely, 2^99815528563 is an apocalyptic number.

99815528563 is a deficient number, since it is larger than the sum of its proper divisors (1).

99815528563 is an equidigital number, since it uses as much as digits as its factorization.

99815528563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328000, while the sum is 61.

The spelling of 99815528563 in words is "ninety-nine billion, eight hundred fifteen million, five hundred twenty-eight thousand, five hundred sixty-three".