8865640081 has 8 divisors (see below), whose sum is σ = 8898349824. Its totient is φ = 8832991200.

The previous prime is 8865640079. The next prime is 8865640109. The reversal of 8865640081 is 1800465688.

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

It is a cyclic number.

It is not a de Polignac number, because 8865640081 - 2¹ = 8865640079 is a prime.

It is a super-2 number, since 2×8865640081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8865640051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287640 + ... + 316966.

It is an arithmetic number, because the mean of its divisors is an integer number (1112293728).

Almost surely, 2^8865640081 is an apocalyptic number.

It is an amenable number.

8865640081 is a deficient number, since it is larger than the sum of its proper divisors (32709743).

8865640081 is a wasteful number, since it uses less digits than its factorization.

8865640081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30431.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 8865640081 is about 94157.5280102446. The cubic root of 8865640081 is about 2069.6807742072.

The spelling of 8865640081 in words is "eight billion, eight hundred sixty-five million, six hundred forty thousand, eighty-one".