641224148 has 6 divisors (see below), whose sum is σ = 1122142266. Its totient is φ = 320612072.

The previous prime is 641224081. The next prime is 641224151. The reversal of 641224148 is 841422146.

It can be written as a sum of positive squares in only one way, i.e., 638168644 + 3055504 = 25262^2 + 1748^2 .

It is a super-3 number, since 3×641224148³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80153015 + ... + 80153022.

It is an arithmetic number, because the mean of its divisors is an integer number (187023711).

Almost surely, 2^641224148 is an apocalyptic number.

It is an amenable number.

641224148 is a deficient number, since it is larger than the sum of its proper divisors (480918118).

641224148 is a wasteful number, since it uses less digits than its factorization.

641224148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160306041 (or 160306039 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 641224148 is about 25322.4040722835. The cubic root of 641224148 is about 862.3229733439.

The spelling of 641224148 in words is "six hundred forty-one million, two hundred twenty-four thousand, one hundred forty-eight".