641696412 has 96 divisors (see below), whose sum is σ = 1829366784. Its totient is φ = 171072000.

The previous prime is 641696401. The next prime is 641696413. The reversal of 641696412 is 214696146.

641696412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641696413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75162 + ... + 83262.

It is an arithmetic number, because the mean of its divisors is an integer number (19055904).

Almost surely, 2^641696412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641696412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914683392).

641696412 is an abundant number, since it is smaller than the sum of its proper divisors (1187670372).

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

641696412 is a wasteful number, since it uses less digits than its factorization.

641696412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8179 (or 8177 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 641696412 is about 25331.7273789215. The cubic root of 641696412 is about 862.5346227647.

The spelling of 641696412 in words is "six hundred forty-one million, six hundred ninety-six thousand, four hundred twelve".