641215160 has 64 divisors (see below), whose sum is σ = 1554094080. Its totient is φ = 237409920.

The previous prime is 641215151. The next prime is 641215177. The reversal of 641215160 is 61512146.

It is a super-2 number, since 2×641215160² = 822313762827651200, 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17279 + ... + 39761.

It is an arithmetic number, because the mean of its divisors is an integer number (24282720).

Almost surely, 2^641215160 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 641215160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777047040).

641215160 is an abundant number, since it is smaller than the sum of its proper divisors (912878920).

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

641215160 is a wasteful number, since it uses less digits than its factorization.

641215160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22548 (or 22544 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 641215160 is about 25322.2266003604. The cubic root of 641215160 is about 862.3189442821.

The spelling of 641215160 in words is "six hundred forty-one million, two hundred fifteen thousand, one hundred sixty".