865886080900 has 27 divisors (see below), whose sum is σ = 1878992988271. Its totient is φ = 346350710240.

The previous prime is 865886080897. The next prime is 865886080903. The reversal of 865886080900 is 9080688568.

The square root of 865886080900 is 930530.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (865886080897) and next prime (865886080903).

It can be written as a sum of positive squares in 4 ways, for example, as 107816349316 + 758069731584 = 328354^2 + 870672^2 .

It is a super-2 number, since 2×865886080900² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865886080903) 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 8 ways as a sum of consecutive naturals, for example, 9258774 + ... + 9351826.

Almost surely, 2^865886080900 is an apocalyptic number.

865886080900 is the 930530-th square number.

It is an amenable number.

865886080900 is an abundant number, since it is smaller than the sum of its proper divisors (1013106907371).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865886080900 is an frugal number, since it uses more digits than its factorization.

865886080900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186120 (or 93060 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 58.

The spelling of 865886080900 in words is "eight hundred sixty-five billion, eight hundred eighty-six million, eighty thousand, nine hundred".