641517531152 has 20 divisors (see below), whose sum is σ = 1242964955196. Its totient is φ = 320752381440.

The previous prime is 641517531119. The next prime is 641517531163. The reversal of 641517531152 is 251135715146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 217226837776 + 424290693376 = 466076^2 + 651376^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490028 + ... + 1234164.

Almost surely, 2^641517531152 is an apocalyptic number.

It is an amenable number.

641517531152 is a deficient number, since it is larger than the sum of its proper divisors (601447424044).

641517531152 is a wasteful number, since it uses less digits than its factorization.

641517531152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798026 (or 798020 counting only the distinct ones).

The product of its digits is 126000, while the sum is 41.

The spelling of 641517531152 in words is "six hundred forty-one billion, five hundred seventeen million, five hundred thirty-one thousand, one hundred fifty-two".