987507961291 has 16 divisors (see below), whose sum is σ = 998242732800. Its totient is φ = 976809996288.

The previous prime is 987507961267. The next prime is 987507961379. The reversal of 987507961291 is 192169705789.

It is a cyclic number.

It is not a de Polignac number, because 987507961291 - 2⁷ = 987507961163 is a prime.

It is a super-2 number, since 2×987507961291² (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 (987507961211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212868550 + ... + 212873188.

It is an arithmetic number, because the mean of its divisors is an integer number (62390170800).

Almost surely, 2^987507961291 is an apocalyptic number.

987507961291 is a deficient number, since it is larger than the sum of its proper divisors (10734771509).

987507961291 is a wasteful number, since it uses less digits than its factorization.

987507961291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8118.

The product of its (nonzero) digits is 17146080, while the sum is 64.

The spelling of 987507961291 in words is "nine hundred eighty-seven billion, five hundred seven million, nine hundred sixty-one thousand, two hundred ninety-one".