641224144 has 40 divisors (see below), whose sum is σ = 1357091712. Its totient is φ = 291083520.

The previous prime is 641224081. The next prime is 641224151. The reversal of 641224144 is 441422146.

It is a super-2 number, since 2×641224144² = 822336805697065472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 165817 + ... + 169639.

Almost surely, 2^641224144 is an apocalyptic number.

It is an amenable number.

641224144 is an abundant number, since it is smaller than the sum of its proper divisors (715867568).

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

641224144 is a wasteful number, since it uses less digits than its factorization.

641224144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795 (or 4789 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 641224144 is about 25322.4039933021. The cubic root of 641224144 is about 862.3229715508.

It can be divided in two parts, 641 and 224144, that added together give a triangular number (224785 = T₆₇₀).

The spelling of 641224144 in words is "six hundred forty-one million, two hundred twenty-four thousand, one hundred forty-four".