641605234 has 16 divisors (see below), whose sum is σ = 989337600. Its totient is φ = 311842224.

The previous prime is 641605207. The next prime is 641605297. The reversal of 641605234 is 432506146.

It is a junction number, because it is equal to n+sod(n) for n = 641605196 and 641605205.

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, 91257 + ... + 98035.

It is an arithmetic number, because the mean of its divisors is an integer number (61833600).

Almost surely, 2^641605234 is an apocalyptic number.

641605234 is a deficient number, since it is larger than the sum of its proper divisors (347732366).

641605234 is a wasteful number, since it uses less digits than its factorization.

641605234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8097.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 641605234 is about 25329.9276351118. The cubic root of 641605234 is about 862.4937686030.

The spelling of 641605234 in words is "six hundred forty-one million, six hundred five thousand, two hundred thirty-four".