109157439971987 has 8 divisors (see below), whose sum is σ = 119244641198592. Its totient is φ = 99097538344200.

The previous prime is 109157439971939. The next prime is 109157439972041. The reversal of 109157439971987 is 789179934751901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109157439971987 - 2³² = 109153145004691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109157439971287) 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 7 ways as a sum of consecutive naturals, for example, 6824891339 + ... + 6824907332.

It is an arithmetic number, because the mean of its divisors is an integer number (14905580149824).

Almost surely, 2^{109157439971987} is an apocalyptic number.

109157439971987 is a deficient number, since it is larger than the sum of its proper divisors (10087201226605).

109157439971987 is a wasteful number, since it uses less digits than its factorization.

109157439971987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13649799409.

The product of its (nonzero) digits is 1080203040, while the sum is 80.

The spelling of 109157439971987 in words is "one hundred nine trillion, one hundred fifty-seven billion, four hundred thirty-nine million, nine hundred seventy-one thousand, nine hundred eighty-seven".