87138883785 has 64 divisors (see below), whose sum is σ = 146242658304. Its totient is φ = 44250624000.

The previous prime is 87138883771. The next prime is 87138883837. The reversal of 87138883785 is 58738883178.

It is not a de Polignac number, because 87138883785 - 2⁸ = 87138883529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49878282 + ... + 49880028.

It is an arithmetic number, because the mean of its divisors is an integer number (2285041536).

Almost surely, 2^87138883785 is an apocalyptic number.

It is an amenable number.

87138883785 is a deficient number, since it is larger than the sum of its proper divisors (59103774519).

87138883785 is a wasteful number, since it uses less digits than its factorization.

87138883785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454.

The product of its digits is 72253440, while the sum is 66.

The spelling of 87138883785 in words is "eighty-seven billion, one hundred thirty-eight million, eight hundred eighty-three thousand, seven hundred eighty-five".