641418606 has 96 divisors (see below), whose sum is σ = 1516263840. Its totient is φ = 195270912.

The previous prime is 641418593. The next prime is 641418629. The reversal of 641418606 is 606814146.

641418606 is a `hidden beast` number, since 6 + 4 + 1 + 41 + 8 + 606 = 666.

It is a super-2 number, since 2×641418606² = 822835656245966472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2188996 + ... + 2189288.

It is an arithmetic number, because the mean of its divisors is an integer number (15794415).

Almost surely, 2^641418606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641418606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758131920).

641418606 is an abundant number, since it is smaller than the sum of its proper divisors (874845234).

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

641418606 is a wasteful number, since it uses less digits than its factorization.

641418606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 641418606 is about 25326.2434245586. The cubic root of 641418606 is about 862.4101340522.

The spelling of 641418606 in words is "six hundred forty-one million, four hundred eighteen thousand, six hundred six".