864632511 has 6 divisors (see below), whose sum is σ = 1248913640. Its totient is φ = 576421668.

The previous prime is 864632479. The next prime is 864632557. The reversal of 864632511 is 115236468.

It is a happy number.

864632511 is a `hidden beast` number, since 8 + 6 + 4 + 632 + 5 + 11 = 666.

It is not a de Polignac number, because 864632511 - 2⁵ = 864632479 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 (864632711) 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 5 ways as a sum of consecutive naturals, for example, 48035131 + ... + 48035148.

Almost surely, 2^864632511 is an apocalyptic number.

864632511 is a deficient number, since it is larger than the sum of its proper divisors (384281129).

864632511 is a wasteful number, since it uses less digits than its factorization.

864632511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96070285 (or 96070282 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 864632511 is about 29404.6341755853. The cubic root of 864632511 is about 952.6729931518.

Adding to 864632511 its reverse (115236468), we get a palindrome (979868979).

It can be divided in two parts, 864 and 632511, that added together give a triangular number (633375 = T₁₁₂₅).

The spelling of 864632511 in words is "eight hundred sixty-four million, six hundred thirty-two thousand, five hundred eleven".