987618849831 has 6 divisors (see below), whose sum is σ = 1426560560880. Its totient is φ = 658412566548.

The previous prime is 987618849817. The next prime is 987618849857. The reversal of 987618849831 is 138948816789.

987618849831 is a `hidden beast` number, since 98 + 7 + 6 + 18 + 8 + 498 + 31 = 666.

It is not a de Polignac number, because 987618849831 - 2⁹ = 987618849319 is a prime.

It is a super-2 number, since 2×987618849831² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 987618849831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987618849881) 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 5 ways as a sum of consecutive naturals, for example, 54867713871 + ... + 54867713888.

It is an arithmetic number, because the mean of its divisors is an integer number (237760093480).

Almost surely, 2^987618849831 is an apocalyptic number.

987618849831 is a deficient number, since it is larger than the sum of its proper divisors (438941711049).

987618849831 is a wasteful number, since it uses less digits than its factorization.

987618849831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109735427765 (or 109735427762 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 72.

The spelling of 987618849831 in words is "nine hundred eighty-seven billion, six hundred eighteen million, eight hundred forty-nine thousand, eight hundred thirty-one".