987153538091 has 4 divisors (see below), whose sum is σ = 1128175472112. Its totient is φ = 846131604072.

The previous prime is 987153538079. The next prime is 987153538109. The reversal of 987153538091 is 190835351789.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 987153538091 - 2²² = 987149343787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 987153538091.

It is not an unprimeable number, because it can be changed into a prime (987153538051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70510967000 + ... + 70510967013.

It is an arithmetic number, because the mean of its divisors is an integer number (282043868028).

Almost surely, 2^987153538091 is an apocalyptic number.

987153538091 is a deficient number, since it is larger than the sum of its proper divisors (141021934021).

987153538091 is a wasteful number, since it uses less digits than its factorization.

987153538091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141021934020.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 987153538091 in words is "nine hundred eighty-seven billion, one hundred fifty-three million, five hundred thirty-eight thousand, ninety-one".