87891696117 has 48 divisors (see below), whose sum is σ = 136345809600. Its totient is φ = 54388039680.

The previous prime is 87891696103. The next prime is 87891696143. The reversal of 87891696117 is 71169619878.

87891696117 is a `hidden beast` number, since 8 + 7 + 8 + 9 + 1 + 6 + 9 + 611 + 7 = 666.

It is not a de Polignac number, because 87891696117 - 2¹⁰ = 87891695093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87891696317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6963142 + ... + 6975752.

It is an arithmetic number, because the mean of its divisors is an integer number (2840537700).

Almost surely, 2^87891696117 is an apocalyptic number.

It is an amenable number.

87891696117 is a deficient number, since it is larger than the sum of its proper divisors (48454113483).

87891696117 is a wasteful number, since it uses less digits than its factorization.

87891696117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13458 (or 13455 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 63.

The spelling of 87891696117 in words is "eighty-seven billion, eight hundred ninety-one million, six hundred ninety-six thousand, one hundred seventeen".