641536610044 has 24 divisors (see below), whose sum is σ = 1229271111936. Its totient is φ = 290531502000.

The previous prime is 641536609963. The next prime is 641536610069. The reversal of 641536610044 is 440016635146.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 641536609979 and 641536610006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26889142 + ... + 26912989.

It is an arithmetic number, because the mean of its divisors is an integer number (51219629664).

Almost surely, 2^641536610044 is an apocalyptic number.

It is an amenable number.

641536610044 is a deficient number, since it is larger than the sum of its proper divisors (587734501892).

641536610044 is a wasteful number, since it uses less digits than its factorization.

641536610044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53802417 (or 53802415 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 641536610044 in words is "six hundred forty-one billion, five hundred thirty-six million, six hundred ten thousand, forty-four".