1640453455 has 16 divisors (see below), whose sum is σ = 2013289344. Its totient is φ = 1282612480.

The previous prime is 1640453401. The next prime is 1640453459. The reversal of 1640453455 is 5543540461.

It is not a de Polignac number, because 1640453455 - 2²⁵ = 1606899023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640453459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174249 + ... + 183421.

It is an arithmetic number, because the mean of its divisors is an integer number (125830584).

Almost surely, 2^1640453455 is an apocalyptic number.

1640453455 is a deficient number, since it is larger than the sum of its proper divisors (372835889).

1640453455 is an equidigital number, since it uses as much as digits as its factorization.

1640453455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9986.

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 1640453455 is about 40502.5117122383. The cubic root of 1640453455 is about 1179.3823865066.

The spelling of 1640453455 in words is "one billion, six hundred forty million, four hundred fifty-three thousand, four hundred fifty-five".