641212476 has 12 divisors (see below), whose sum is σ = 1496162472. Its totient is φ = 213737488.

The previous prime is 641212457. The next prime is 641212487. The reversal of 641212476 is 674212146.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×641212476² = 822306878756101152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 26717175 + ... + 26717198.

It is an arithmetic number, because the mean of its divisors is an integer number (124680206).

Almost surely, 2^641212476 is an apocalyptic number.

It is an amenable number.

641212476 is an abundant number, since it is smaller than the sum of its proper divisors (854949996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641212476 is a wasteful number, since it uses less digits than its factorization.

641212476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53434380 (or 53434378 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 641212476 is about 25322.1736033856. The cubic root of 641212476 is about 862.3177411149.

The spelling of 641212476 in words is "six hundred forty-one million, two hundred twelve thousand, four hundred seventy-six".