641552334 has 16 divisors (see below), whose sum is σ = 1283352960. Its totient is φ = 213809400.

The previous prime is 641552279. The next prime is 641552381. The reversal of 641552334 is 433255146.

It is a junction number, because it is equal to n+sod(n) for n = 641552295 and 641552304.

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, 54909 + ... + 65559.

It is an arithmetic number, because the mean of its divisors is an integer number (80209560).

Almost surely, 2^641552334 is an apocalyptic number.

641552334 is an abundant number, since it is smaller than the sum of its proper divisors (641800626).

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

641552334 is a wasteful number, since it uses less digits than its factorization.

641552334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20695.

The product of its digits is 43200, while the sum is 33.

The square root of 641552334 is about 25328.8833942596. The cubic root of 641552334 is about 862.4700639053.

The spelling of 641552334 in words is "six hundred forty-one million, five hundred fifty-two thousand, three hundred thirty-four".