87565875081 has 16 divisors (see below), whose sum is σ = 117963356160. Its totient is φ = 57773546640.

The previous prime is 87565875079. The next prime is 87565875083. The reversal of 87565875081 is 18057856578.

It is an interprime number because it is at equal distance from previous prime (87565875079) and next prime (87565875083).

It is not a de Polignac number, because 87565875081 - 2¹ = 87565875079 is a prime.

It is a super-2 number, since 2×87565875081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87565875083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398176 + ... + 577646.

It is an arithmetic number, because the mean of its divisors is an integer number (7372709760).

Almost surely, 2^87565875081 is an apocalyptic number.

It is an amenable number.

87565875081 is a deficient number, since it is larger than the sum of its proper divisors (30397481079).

87565875081 is a wasteful number, since it uses less digits than its factorization.

87565875081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181156.

The product of its (nonzero) digits is 18816000, while the sum is 60.

The spelling of 87565875081 in words is "eighty-seven billion, five hundred sixty-five million, eight hundred seventy-five thousand, eighty-one".