87687837721671 has 32 divisors (see below), whose sum is σ = 127741691437056. Its totient is φ = 53062639740000.

The previous prime is 87687837721577. The next prime is 87687837721711. The reversal of 87687837721671 is 17612773878678.

It is not a de Polignac number, because 87687837721671 - 2¹⁵ = 87687837688903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87687837725671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61661596 + ... + 63067646.

It is an arithmetic number, because the mean of its divisors is an integer number (3991927857408).

Almost surely, 2^{87687837721671} is an apocalyptic number.

87687837721671 is a deficient number, since it is larger than the sum of its proper divisors (40053853715385).

87687837721671 is a wasteful number, since it uses less digits than its factorization.

87687837721671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408963.

The product of its digits is 1858719744, while the sum is 78.

The spelling of 87687837721671 in words is "eighty-seven trillion, six hundred eighty-seven billion, eight hundred thirty-seven million, seven hundred twenty-one thousand, six hundred seventy-one".