641180806 has 16 divisors (see below), whose sum is σ = 1163824416. Its totient is φ = 258627456.

The previous prime is 641180801. The next prime is 641180879. The reversal of 641180806 is 608081146.

It is a super-2 number, since 2×641180806² = 822225651965619272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641180801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346781 + ... + 1347256.

It is an arithmetic number, because the mean of its divisors is an integer number (72739026).

Almost surely, 2^641180806 is an apocalyptic number.

641180806 is a deficient number, since it is larger than the sum of its proper divisors (522643610).

641180806 is a wasteful number, since it uses less digits than its factorization.

641180806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694063.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 641180806 is about 25321.5482544018. The cubic root of 641180806 is about 862.3035440255.

The spelling of 641180806 in words is "six hundred forty-one million, one hundred eighty thousand, eight hundred six".