640253877059 has 2 divisors, whose sum is σ = 640253877060. Its totient is φ = 640253877058.

The previous prime is 640253877049. The next prime is 640253877127. The reversal of 640253877059 is 950778352046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640253877059 - 2¹⁶ = 640253811523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640253876995 and 640253877013.

It is not a weakly prime, because it can be changed into another prime (640253877049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320126938529 + 320126938530.

It is an arithmetic number, because the mean of its divisors is an integer number (320126938530).

Almost surely, 2^640253877059 is an apocalyptic number.

640253877059 is a deficient number, since it is larger than the sum of its proper divisors (1).

640253877059 is an equidigital number, since it uses as much as digits as its factorization.

640253877059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 640253877059 in words is "six hundred forty billion, two hundred fifty-three million, eight hundred seventy-seven thousand, fifty-nine".