864642511 has 8 divisors (see below), whose sum is σ = 897343200. Its totient is φ = 832134240.

The previous prime is 864642469. The next prime is 864642523. The reversal of 864642511 is 115246468.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864642511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864642551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38916 + ... + 56953.

It is an arithmetic number, because the mean of its divisors is an integer number (112167900).

Almost surely, 2^864642511 is an apocalyptic number.

864642511 is a deficient number, since it is larger than the sum of its proper divisors (32700689).

864642511 is a wasteful number, since it uses less digits than its factorization.

864642511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96209.

The product of its digits is 46080, while the sum is 37.

The square root of 864642511 is about 29404.8042163181. The cubic root of 864642511 is about 952.6766658848.

Adding to 864642511 its reverse (115246468), we get a palindrome (979888979).

The spelling of 864642511 in words is "eight hundred sixty-four million, six hundred forty-two thousand, five hundred eleven".