641443325 has 24 divisors (see below), whose sum is σ = 838696320. Its totient is φ = 485308800.

The previous prime is 641443307. The next prime is 641443333. The reversal of 641443325 is 523344146.

It is not a de Polignac number, because 641443325 - 2⁶ = 641443261 is a prime.

It is a super-2 number, since 2×641443325² = 822899078374111250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641443291 and 641443300.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 520460 + ... + 521690.

It is an arithmetic number, because the mean of its divisors is an integer number (34945680).

Almost surely, 2^641443325 is an apocalyptic number.

It is an amenable number.

641443325 is a deficient number, since it is larger than the sum of its proper divisors (197252995).

641443325 is a wasteful number, since it uses less digits than its factorization.

641443325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357 (or 2352 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 641443325 is about 25326.7314314343. The cubic root of 641443325 is about 862.4212124349.

The spelling of 641443325 in words is "six hundred forty-one million, four hundred forty-three thousand, three hundred twenty-five".