87691799889 has 24 divisors (see below), whose sum is σ = 127340158400. Its totient is φ = 58150195488.

The previous prime is 87691799863. The next prime is 87691799903. The reversal of 87691799889 is 98899719678.

It is not a de Polignac number, because 87691799889 - 2⁷ = 87691799761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87691797889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9571899 + ... + 9581055.

Almost surely, 2^87691799889 is an apocalyptic number.

It is an amenable number.

87691799889 is a deficient number, since it is larger than the sum of its proper divisors (39648358511).

87691799889 is a wasteful number, since it uses less digits than its factorization.

87691799889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14709 (or 14706 counting only the distinct ones).

The product of its digits is 987614208, while the sum is 81.

The spelling of 87691799889 in words is "eighty-seven billion, six hundred ninety-one million, seven hundred ninety-nine thousand, eight hundred eighty-nine".