641646146 has 8 divisors (see below), whose sum is σ = 985944204. Its totient is φ = 312998080.

The previous prime is 641646133. The next prime is 641646149.

641646146 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 641355625 + 290521 = 25325^2 + 539^2 .

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

It is not an unprimeable number, because it can be changed into a prime (641646149) 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, 3912395 + ... + 3912558.

Almost surely, 2^641646146 is an apocalyptic number.

641646146 is a deficient number, since it is larger than the sum of its proper divisors (344298058).

641646146 is a wasteful number, since it uses less digits than its factorization.

641646146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7824996.

The product of its digits is 82944, while the sum is 38.

The square root of 641646146 is about 25330.7352044902. The cubic root of 641646146 is about 862.5121005374.

The spelling of 641646146 in words is "six hundred forty-one million, six hundred forty-six thousand, one hundred forty-six".