641536172106 has 8 divisors (see below), whose sum is σ = 1283072344224. Its totient is φ = 213845390700.

The previous prime is 641536172063. The next prime is 641536172111. The reversal of 641536172106 is 601271635146.

It is a sphenic number, since it is the product of 3 distinct primes.

641536172106 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53461347670 + ... + 53461347681.

It is an arithmetic number, because the mean of its divisors is an integer number (160384043028).

Almost surely, 2^641536172106 is an apocalyptic number.

641536172106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

641536172106 is a wasteful number, since it uses less digits than its factorization.

641536172106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106922695356.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 641536172106 in words is "six hundred forty-one billion, five hundred thirty-six million, one hundred seventy-two thousand, one hundred six".