101987842563 has 12 divisors (see below), whose sum is σ = 147320773600. Its totient is φ = 67989586896.

The previous prime is 101987842531. The next prime is 101987842589. The reversal of 101987842563 is 365248789101.

101987842563 is a `hidden beast` number, since 1 + 0 + 1 + 9 + 8 + 78 + 4 + 2 + 563 = 666.

It is not a de Polignac number, because 101987842563 - 2⁵ = 101987842531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101987849563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113013 + ... + 465561.

It is a 1-persistent number, because it is pandigital, but 2⋅101987842563 = 203975685126 is not.

Almost surely, 2^101987842563 is an apocalyptic number.

101987842563 is a deficient number, since it is larger than the sum of its proper divisors (45332931037).

101987842563 is a wasteful number, since it uses less digits than its factorization.

101987842563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384698 (or 384695 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 101987842563 in words is "one hundred one billion, nine hundred eighty-seven million, eight hundred forty-two thousand, five hundred sixty-three".