87877091871 has 6 divisors (see below), whose sum is σ = 126933577160. Its totient is φ = 58584727908.

The previous prime is 87877091851. The next prime is 87877091909. The reversal of 87877091871 is 17819077878.

It is not a de Polignac number, because 87877091871 - 2¹⁴ = 87877075487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87877091799 and 87877091808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87877091851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4882060651 + ... + 4882060668.

Almost surely, 2^87877091871 is an apocalyptic number.

87877091871 is a deficient number, since it is larger than the sum of its proper divisors (39056485289).

87877091871 is a wasteful number, since it uses less digits than its factorization.

87877091871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764121325 (or 9764121322 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 63.

The spelling of 87877091871 in words is "eighty-seven billion, eight hundred seventy-seven million, ninety-one thousand, eight hundred seventy-one".