641006518 has 8 divisors (see below), whose sum is σ = 966881880. Its totient is φ = 318712560.

The previous prime is 641006501. The next prime is 641006519. The reversal of 641006518 is 815600146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×641006518² = 821778712236968648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641006518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641006519) 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, 894903 + ... + 895618.

It is an arithmetic number, because the mean of its divisors is an integer number (120860235).

Almost surely, 2^641006518 is an apocalyptic number.

641006518 is a deficient number, since it is larger than the sum of its proper divisors (325875362).

641006518 is a wasteful number, since it uses less digits than its factorization.

641006518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790702.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 641006518 is about 25318.1065247779. The cubic root of 641006518 is about 862.2254054942.

The spelling of 641006518 in words is "six hundred forty-one million, six thousand, five hundred eighteen".