641212512 has 96 divisors (see below), whose sum is σ = 1723607424. Its totient is φ = 208665600.

The previous prime is 641212501. The next prime is 641212519. The reversal of 641212512 is 215212146.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×641212512² = 822306971090700288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641212519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842212 + ... + 842972.

It is an arithmetic number, because the mean of its divisors is an integer number (17954244).

Almost surely, 2^641212512 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 641212512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861803712).

641212512 is an abundant number, since it is smaller than the sum of its proper divisors (1082394912).

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

641212512 is a wasteful number, since it uses less digits than its factorization.

641212512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 964 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 641212512 is about 25322.1743142251. The cubic root of 641212512 is about 862.3177572528.

Adding to 641212512 its reverse (215212146), we get a palindrome (856424658).

The spelling of 641212512 in words is "six hundred forty-one million, two hundred twelve thousand, five hundred twelve".