641870026 has 8 divisors (see below), whose sum is σ = 1100348640. Its totient is φ = 275087148.

The previous prime is 641869961. The next prime is 641870029. The reversal of 641870026 is 620078146.

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

It is a junction number, because it is equal to n+sod(n) for n = 641869973 and 641870000.

It is not an unprimeable number, because it can be changed into a prime (641870029) 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 in 3 ways as a sum of consecutive naturals, for example, 22923916 + ... + 22923943.

It is an arithmetic number, because the mean of its divisors is an integer number (137543580).

Almost surely, 2^641870026 is an apocalyptic number.

641870026 is a deficient number, since it is larger than the sum of its proper divisors (458478614).

641870026 is a wasteful number, since it uses less digits than its factorization.

641870026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45847868.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 641870026 is about 25335.1539565087. The cubic root of 641870026 is about 862.6124033581.

The spelling of 641870026 in words is "six hundred forty-one million, eight hundred seventy thousand, twenty-six".