641848540 has 12 divisors (see below), whose sum is σ = 1347881976. Its totient is φ = 256739408.

The previous prime is 641848531. The next prime is 641848541. The reversal of 641848540 is 45848146.

It is a junction number, because it is equal to n+sod(n) for n = 641848493 and 641848502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641848541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16046194 + ... + 16046233.

It is an arithmetic number, because the mean of its divisors is an integer number (112323498).

Almost surely, 2^641848540 is an apocalyptic number.

It is an amenable number.

641848540 is an abundant number, since it is smaller than the sum of its proper divisors (706033436).

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

641848540 is a wasteful number, since it uses less digits than its factorization.

641848540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32092436 (or 32092434 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 641848540 is about 25334.7299176447. The cubic root of 641848540 is about 862.6027782023.

The spelling of 641848540 in words is "six hundred forty-one million, eight hundred forty-eight thousand, five hundred forty".