641611402 has 16 divisors (see below), whose sum is σ = 998682624. Its totient is φ = 308826000.

The previous prime is 641611379. The next prime is 641611403. The reversal of 641611402 is 204116146.

641611402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (641611403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15249 + ... + 38932.

It is an arithmetic number, because the mean of its divisors is an integer number (62417664).

Almost surely, 2^641611402 is an apocalyptic number.

641611402 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

641611402 is a deficient number, since it is larger than the sum of its proper divisors (357071222).

641611402 is a wasteful number, since it uses less digits than its factorization.

641611402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54405.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 641611402 is about 25330.0493880292. The cubic root of 641611402 is about 862.4965324232.

Adding to 641611402 its reverse (204116146), we get a palindrome (845727548).

The spelling of 641611402 in words is "six hundred forty-one million, six hundred eleven thousand, four hundred two".