641008156 has 6 divisors (see below), whose sum is σ = 1121764280. Its totient is φ = 320504076.

The previous prime is 641008139. The next prime is 641008157. The reversal of 641008156 is 651800146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641008157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80126016 + ... + 80126023.

Almost surely, 2^641008156 is an apocalyptic number.

It is an amenable number.

641008156 is a deficient number, since it is larger than the sum of its proper divisors (480756124).

641008156 is a wasteful number, since it uses less digits than its factorization.

641008156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160252043 (or 160252041 counting only the distinct ones).

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

The square root of 641008156 is about 25318.1388731478. The cubic root of 641008156 is about 862.2261399246.

The spelling of 641008156 in words is "six hundred forty-one million, eight thousand, one hundred fifty-six".