87921870895 has 8 divisors (see below), whose sum is σ = 105509075760. Its totient is φ = 70335609600.

The previous prime is 87921870893. The next prime is 87921870899. The reversal of 87921870895 is 59807812978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87921870895 - 2¹ = 87921870893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87921870893) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11485 + ... + 419494.

It is an arithmetic number, because the mean of its divisors is an integer number (13188634470).

Almost surely, 2^87921870895 is an apocalyptic number.

87921870895 is a deficient number, since it is larger than the sum of its proper divisors (17587204865).

87921870895 is a wasteful number, since it uses less digits than its factorization.

87921870895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471785.

The product of its (nonzero) digits is 20321280, while the sum is 64.

The spelling of 87921870895 in words is "eighty-seven billion, nine hundred twenty-one million, eight hundred seventy thousand, eight hundred ninety-five".