864057641 has 4 divisors (see below), whose sum is σ = 864116484. Its totient is φ = 863998800.

The previous prime is 864057617. The next prime is 864057643. The reversal of 864057641 is 146750468.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 835210000 + 28847641 = 28900^2 + 5371^2 .

It is a cyclic number.

It is not a de Polignac number, because 864057641 - 2⁶ = 864057577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864057643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12851 + ... + 43511.

It is an arithmetic number, because the mean of its divisors is an integer number (216029121).

Almost surely, 2^864057641 is an apocalyptic number.

It is an amenable number.

864057641 is a deficient number, since it is larger than the sum of its proper divisors (58843).

864057641 is a wasteful number, since it uses less digits than its factorization.

864057641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58842.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 864057641 is about 29394.8573903668. The cubic root of 864057641 is about 952.4618111229.

The spelling of 864057641 in words is "eight hundred sixty-four million, fifty-seven thousand, six hundred forty-one".