87856516836 has 189 divisors, whose sum is σ = 253887976083. Its totient is φ = 26569833840.

The previous prime is 87856516823. The next prime is 87856516841. The reversal of 87856516836 is 63861565878.

It is a happy number.

The square root of 87856516836 is 296406.

It is a perfect power (a square), and thus also a powerful number.

87856516836 is a `hidden beast` number, since 8 + 7 + 8 + 565 + 1 + 68 + 3 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 176064915 + ... + 176065413.

Almost surely, 2^87856516836 is an apocalyptic number.

87856516836 is the 296406-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87856516836

87856516836 is an abundant number, since it is smaller than the sum of its proper divisors (166031459247).

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

87856516836 is an equidigital number, since it uses as much as digits as its factorization.

87856516836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 515 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 87856516836 in words is "eighty-seven billion, eight hundred fifty-six million, five hundred sixteen thousand, eight hundred thirty-six".