987618849867 has 40 divisors (see below), whose sum is σ = 1598003147664. Its totient is φ = 604252239552.

The previous prime is 987618849857. The next prime is 987618849881. The reversal of 987618849867 is 768948816789.

987618849867 is a `hidden beast` number, since 9 + 8 + 7 + 61 + 8 + 8 + 498 + 67 = 666.

It is not a de Polignac number, because 987618849867 - 2¹¹ = 987618847819 is a prime.

It is a super-2 number, since 2×987618849867² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (987618849817) 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 39 ways as a sum of consecutive naturals, for example, 2528553 + ... + 2892890.

Almost surely, 2^987618849867 is an apocalyptic number.

987618849867 is a deficient number, since it is larger than the sum of its proper divisors (610384297797).

987618849867 is a wasteful number, since it uses less digits than its factorization.

987618849867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421641 (or 5421632 counting only the distinct ones).

The product of its digits is 2341011456, while the sum is 81.

The spelling of 987618849867 in words is "nine hundred eighty-seven billion, six hundred eighteen million, eight hundred forty-nine thousand, eight hundred sixty-seven".