1640344345255 has 16 divisors (see below), whose sum is σ = 2454125566464. Its totient is φ = 1022552318880.

The previous prime is 1640344345253. The next prime is 1640344345301. The reversal of 1640344345255 is 5525434430461.

It is not a de Polignac number, because 1640344345255 - 2¹ = 1640344345253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640344345253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2130316947 + ... + 2130317716.

It is an arithmetic number, because the mean of its divisors is an integer number (153382847904).

Almost surely, 2^{1640344345255} is an apocalyptic number.

1640344345255 is a deficient number, since it is larger than the sum of its proper divisors (813781221209).

1640344345255 is a wasteful number, since it uses less digits than its factorization.

1640344345255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260634686.

The product of its (nonzero) digits is 3456000, while the sum is 46.

The spelling of 1640344345255 in words is "one trillion, six hundred forty billion, three hundred forty-four million, three hundred forty-five thousand, two hundred fifty-five".