640045020053 has 2 divisors, whose sum is σ = 640045020054. Its totient is φ = 640045020052.

The previous prime is 640045020047. The next prime is 640045020077. The reversal of 640045020053 is 350020540046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639988800049 + 56220004 = 799993^2 + 7498^2 .

It is a cyclic number.

It is not a de Polignac number, because 640045020053 - 2¹⁴ = 640045003669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640045019998 and 640045020025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640045020023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320022510026 + 320022510027.

It is an arithmetic number, because the mean of its divisors is an integer number (320022510027).

Almost surely, 2^640045020053 is an apocalyptic number.

It is an amenable number.

640045020053 is a deficient number, since it is larger than the sum of its proper divisors (1).

640045020053 is an equidigital number, since it uses as much as digits as its factorization.

640045020053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 640045020053 its reverse (350020540046), we get a palindrome (990065560099).

The spelling of 640045020053 in words is "six hundred forty billion, forty-five million, twenty thousand, fifty-three".