641601352 has 32 divisors (see below), whose sum is σ = 1455736320. Its totient is φ = 258796800.

The previous prime is 641601347. The next prime is 641601361. The reversal of 641601352 is 253106146.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 641601352.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336024 + ... + 337927.

It is an arithmetic number, because the mean of its divisors is an integer number (45491760).

Almost surely, 2^641601352 is an apocalyptic number.

It is an amenable number.

641601352 is an abundant number, since it is smaller than the sum of its proper divisors (814134968).

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

641601352 is a wasteful number, since it uses less digits than its factorization.

641601352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673981 (or 673977 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 641601352 is about 25329.8510062732. The cubic root of 641601352 is about 862.4920291079.

Adding to 641601352 its reverse (253106146), we get a palindrome (894707498).

The spelling of 641601352 in words is "six hundred forty-one million, six hundred one thousand, three hundred fifty-two".