641017672 has 16 divisors (see below), whose sum is σ = 1218373740. Its totient is φ = 316118016.

The previous prime is 641017661. The next prime is 641017679. The reversal of 641017672 is 276710146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 634737636 + 6280036 = 25194^2 + 2506^2 .

It is not an unprimeable number, because it can be changed into a prime (641017679) 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, 548233 + ... + 549400.

Almost surely, 2^641017672 is an apocalyptic number.

It is an amenable number.

641017672 is a deficient number, since it is larger than the sum of its proper divisors (577356068).

641017672 is a wasteful number, since it uses less digits than its factorization.

641017672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097712 (or 1097708 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 641017672 is about 25318.3268009559. The cubic root of 641017672 is about 862.2304065907.

The spelling of 641017672 in words is "six hundred forty-one million, seventeen thousand, six hundred seventy-two".