87556865578 has 24 divisors (see below), whose sum is σ = 162531599328. Its totient is φ = 34637879952.

The previous prime is 87556865573. The next prime is 87556865639.

87556865578 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×87556865578² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87556865573) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 18500776 + ... + 18505507.

It is an arithmetic number, because the mean of its divisors is an integer number (6772149972).

Almost surely, 2^87556865578 is an apocalyptic number.

87556865578 is a deficient number, since it is larger than the sum of its proper divisors (74974733750).

87556865578 is a wasteful number, since it uses less digits than its factorization.

87556865578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37006318 (or 37006305 counting only the distinct ones).

The product of its digits is 564480000, while the sum is 70.

The spelling of 87556865578 in words is "eighty-seven billion, five hundred fifty-six million, eight hundred sixty-five thousand, five hundred seventy-eight".