1587171727987 has 8 divisors (see below), whose sum is σ = 1599736119296. Its totient is φ = 1574608383432.

The previous prime is 1587171727903. The next prime is 1587171728029. The reversal of 1587171727987 is 7897271717851.

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

It is a cyclic number.

It is not a de Polignac number, because 1587171727987 - 2⁷ = 1587171727859 is a prime.

It is a super-2 number, since 2×1587171727987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1587171727087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936968 + ... + 3435130.

It is an arithmetic number, because the mean of its divisors is an integer number (199967014912).

Almost surely, 2^{1587171727987} is an apocalyptic number.

1587171727987 is a deficient number, since it is larger than the sum of its proper divisors (12564391309).

1587171727987 is a wasteful number, since it uses less digits than its factorization.

1587171727987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523377.

The product of its digits is 96808320, while the sum is 70.

The spelling of 1587171727987 in words is "one trillion, five hundred eighty-seven billion, one hundred seventy-one million, seven hundred twenty-seven thousand, nine hundred eighty-seven".