641326153 has 4 divisors (see below), whose sum is σ = 690658948. Its totient is φ = 591993360.

The previous prime is 641326151. The next prime is 641326157. The reversal of 641326153 is 351623146.

641326153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99740169 + 541585984 = 9987^2 + 23272^2 .

It is a cyclic number.

It is not a de Polignac number, because 641326153 - 2¹ = 641326151 is a prime.

It is a super-2 number, since 2×641326153² = 822598469043558818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641326151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24666378 + ... + 24666403.

It is an arithmetic number, because the mean of its divisors is an integer number (172664737).

Almost surely, 2^641326153 is an apocalyptic number.

It is an amenable number.

641326153 is a deficient number, since it is larger than the sum of its proper divisors (49332795).

641326153 is a wasteful number, since it uses less digits than its factorization.

641326153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49332794.

The product of its digits is 12960, while the sum is 31.

The square root of 641326153 is about 25324.4181176982. The cubic root of 641326153 is about 862.3686966121.

Adding to 641326153 its reverse (351623146), we get a palindrome (992949299).

The spelling of 641326153 in words is "six hundred forty-one million, three hundred twenty-six thousand, one hundred fifty-three".