87756321985 has 16 divisors (see below), whose sum is σ = 106804507392. Its totient is φ = 69207364800.

The previous prime is 87756321967. The next prime is 87756321997. The reversal of 87756321985 is 58912365778.

It is not a de Polignac number, because 87756321985 - 2⁹ = 87756321473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 4849855 + ... + 4867915.

It is an arithmetic number, because the mean of its divisors is an integer number (6675281712).

Almost surely, 2^87756321985 is an apocalyptic number.

It is an amenable number.

87756321985 is a deficient number, since it is larger than the sum of its proper divisors (19048185407).

87756321985 is a wasteful number, since it uses less digits than its factorization.

87756321985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31824.

The product of its digits is 25401600, while the sum is 61.

The spelling of 87756321985 in words is "eighty-seven billion, seven hundred fifty-six million, three hundred twenty-one thousand, nine hundred eighty-five".