87656887928 has 8 divisors (see below), whose sum is σ = 164356664880. Its totient is φ = 43828443960.

The previous prime is 87656887909. The next prime is 87656887931. The reversal of 87656887928 is 82978865678.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5478555488 + ... + 5478555503.

It is an arithmetic number, because the mean of its divisors is an integer number (20544583110).

Almost surely, 2^87656887928 is an apocalyptic number.

It is an amenable number.

87656887928 is a deficient number, since it is larger than the sum of its proper divisors (76699776952).

87656887928 is a wasteful number, since it uses less digits than its factorization.

87656887928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10957110997 (or 10957110993 counting only the distinct ones).

The product of its digits is 650280960, while the sum is 74.

The spelling of 87656887928 in words is "eighty-seven billion, six hundred fifty-six million, eight hundred eighty-seven thousand, nine hundred twenty-eight".