641569134 has 16 divisors (see below), whose sum is σ = 1307349072. Its totient is φ = 209821248.

The previous prime is 641569121. The next prime is 641569157. The reversal of 641569134 is 431965146.

It is a super-3 number, since 3×641569134³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 641569092 and 641569101.

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, 1008439 + ... + 1009074.

It is an arithmetic number, because the mean of its divisors is an integer number (81709317).

Almost surely, 2^641569134 is an apocalyptic number.

641569134 is an abundant number, since it is smaller than the sum of its proper divisors (665779938).

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

641569134 is a wasteful number, since it uses less digits than its factorization.

641569134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017571.

The product of its digits is 77760, while the sum is 39.

The square root of 641569134 is about 25329.2150292898. The cubic root of 641569134 is about 862.4775921925.

The spelling of 641569134 in words is "six hundred forty-one million, five hundred sixty-nine thousand, one hundred thirty-four".