641212960 has 96 divisors (see below), whose sum is σ = 1574581680. Its totient is φ = 246546432.

The previous prime is 641212937. The next prime is 641212961. The reversal of 641212960 is 69212146.

It can be written as a sum of positive squares in 8 ways, for example, as 261274896 + 379938064 = 16164^2 + 19492^2 .

It is a super-2 number, since 2×641212960² = 822308120143923200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641212961) 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, 526272 + ... + 527488.

Almost surely, 2^641212960 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 641212960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (787290840).

641212960 is an abundant number, since it is smaller than the sum of its proper divisors (933368720).

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

641212960 is a wasteful number, since it uses less digits than its factorization.

641212960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 641212960 is about 25322.1831602253. The cubic root of 641212960 is about 862.3179580797.

It can be divided in two parts, 64121 and 2960, that added together give a square (67081 = 259²).

The spelling of 641212960 in words is "six hundred forty-one million, two hundred twelve thousand, nine hundred sixty".