641329396 has 12 divisors (see below), whose sum is σ = 1133439300. Its totient is φ = 317489600.

The previous prime is 641329373. The next prime is 641329411. The reversal of 641329396 is 693923146.

It can be written as a sum of positive squares in 2 ways, for example, as 545876496 + 95452900 = 23364^2 + 9770^2 .

It is a super-2 number, since 2×641329396² = 822606788347449632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793321 + ... + 794128.

It is an arithmetic number, because the mean of its divisors is an integer number (94453275).

Almost surely, 2^641329396 is an apocalyptic number.

It is an amenable number.

641329396 is a deficient number, since it is larger than the sum of its proper divisors (492109904).

641329396 is a wasteful number, since it uses less digits than its factorization.

641329396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587554 (or 1587552 counting only the distinct ones).

The product of its digits is 209952, while the sum is 43.

The square root of 641329396 is about 25324.4821467291. The cubic root of 641329396 is about 862.3701501923.

The spelling of 641329396 in words is "six hundred forty-one million, three hundred twenty-nine thousand, three hundred ninety-six".