87974516556 has 48 divisors (see below), whose sum is σ = 233645069280. Its totient is φ = 28609597440.

The previous prime is 87974516521. The next prime is 87974516557. The reversal of 87974516556 is 65561547978.

87974516556 is a `hidden beast` number, since 8 + 7 + 9 + 74 + 5 + 1 + 6 + 556 = 666.

It is a super-2 number, since 2×87974516556² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87974516493 and 87974516502.

It is not an unprimeable number, because it can be changed into a prime (87974516557) 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 15 ways as a sum of consecutive naturals, for example, 9929461 + ... + 9938316.

It is an arithmetic number, because the mean of its divisors is an integer number (4867605610).

Almost surely, 2^87974516556 is an apocalyptic number.

It is an amenable number.

87974516556 is an abundant number, since it is smaller than the sum of its proper divisors (145670552724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87974516556 is a wasteful number, since it uses less digits than its factorization.

87974516556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19867831 (or 19867823 counting only the distinct ones).

The product of its digits is 63504000, while the sum is 63.

The spelling of 87974516556 in words is "eighty-seven billion, nine hundred seventy-four million, five hundred sixteen thousand, five hundred fifty-six".