640411153 has 2 divisors, whose sum is σ = 640411154. Its totient is φ = 640411152.

The previous prime is 640411139. The next prime is 640411231. The reversal of 640411153 is 351114046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491375889 + 149035264 = 22167^2 + 12208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640411153 is a prime.

It is not a weakly prime, because it can be changed into another prime (640417153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320205576 + 320205577.

It is an arithmetic number, because the mean of its divisors is an integer number (320205577).

Almost surely, 2^640411153 is an apocalyptic number.

It is an amenable number.

640411153 is a deficient number, since it is larger than the sum of its proper divisors (1).

640411153 is an equidigital number, since it uses as much as digits as its factorization.

640411153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 640411153 is about 25306.3461013241. The cubic root of 640411153 is about 861.9583786515.

Adding to 640411153 its reverse (351114046), we get a palindrome (991525199).

The spelling of 640411153 in words is "six hundred forty million, four hundred eleven thousand, one hundred fifty-three".