641654375 has 40 divisors (see below), whose sum is σ = 857313072. Its totient is φ = 478400000.

The previous prime is 641654371. The next prime is 641654381. The reversal of 641654375 is 573456146.

It is not a de Polignac number, because 641654375 - 2² = 641654371 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 (641654371) 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 39 ways as a sum of consecutive naturals, for example, 1391645 + ... + 1392105.

Almost surely, 2^641654375 is an apocalyptic number.

641654375 is a deficient number, since it is larger than the sum of its proper divisors (215658697).

641654375 is a wasteful number, since it uses less digits than its factorization.

641654375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 614 counting only the distinct ones).

The product of its digits is 302400, while the sum is 41.

The square root of 641654375 is about 25330.8976351017. The cubic root of 641654375 is about 862.5157877107.

The spelling of 641654375 in words is "six hundred forty-one million, six hundred fifty-four thousand, three hundred seventy-five".