641065446 has 24 divisors (see below), whose sum is σ = 1587400464. Its totient is φ = 183161520.

The previous prime is 641065423. The next prime is 641065489. The reversal of 641065446 is 644560146.

641065446 is a `hidden beast` number, since 6 + 4 + 106 + 544 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 641065446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2543785 + ... + 2544036.

It is an arithmetic number, because the mean of its divisors is an integer number (66141686).

Almost surely, 2^641065446 is an apocalyptic number.

641065446 is an abundant number, since it is smaller than the sum of its proper divisors (946335018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641065446 is a wasteful number, since it uses less digits than its factorization.

641065446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087836 (or 5087833 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 641065446 is about 25319.2702501474. The cubic root of 641065446 is about 862.2518262665.

The spelling of 641065446 in words is "six hundred forty-one million, sixty-five thousand, four hundred forty-six".