8640360591 has 4 divisors (see below), whose sum is σ = 11520480792. Its totient is φ = 5760240392.

The previous prime is 8640360499. The next prime is 8640360611. The reversal of 8640360591 is 1950630468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8640360591 - 2²³ = 8631971983 is a prime.

It is a super-2 number, since 2×8640360591² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640370591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440060096 + ... + 1440060101.

It is an arithmetic number, because the mean of its divisors is an integer number (2880120198).

Almost surely, 2^8640360591 is an apocalyptic number.

8640360591 is a deficient number, since it is larger than the sum of its proper divisors (2880120201).

8640360591 is a wasteful number, since it uses less digits than its factorization.

8640360591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880120200.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 8640360591 is about 92953.5399594873. The cubic root of 8640360591 is about 2051.9996820009. Note that the first 3 decimals are identical.

The spelling of 8640360591 in words is "eight billion, six hundred forty million, three hundred sixty thousand, five hundred ninety-one".