864761138 has 4 divisors (see below), whose sum is σ = 1297141710. Its totient is φ = 432380568.

The previous prime is 864761123. The next prime is 864761141. The reversal of 864761138 is 831167468.

864761138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 664453729 + 200307409 = 25777^2 + 14153^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216190283 + ... + 216190286.

Almost surely, 2^864761138 is an apocalyptic number.

864761138 is a deficient number, since it is larger than the sum of its proper divisors (432380572).

864761138 is a wasteful number, since it uses less digits than its factorization.

864761138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432380571.

The product of its digits is 193536, while the sum is 44.

The square root of 864761138 is about 29406.8212835050. The cubic root of 864761138 is about 952.7202322549.

The spelling of 864761138 in words is "eight hundred sixty-four million, seven hundred sixty-one thousand, one hundred thirty-eight".