1643413453 has 16 divisors (see below), whose sum is σ = 1853948736. Its totient is φ = 1443911040.

The previous prime is 1643413439. The next prime is 1643413487. The reversal of 1643413453 is 3543143461.

It is a de Polignac number, because none of the positive numbers 2^k-1643413453 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 (1643413153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18025 + ... + 60097.

It is an arithmetic number, because the mean of its divisors is an integer number (115871796).

Almost surely, 2^1643413453 is an apocalyptic number.

It is an amenable number.

1643413453 is a deficient number, since it is larger than the sum of its proper divisors (210535283).

1643413453 is a wasteful number, since it uses less digits than its factorization.

1643413453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42204.

The product of its digits is 51840, while the sum is 34.

The square root of 1643413453 is about 40539.0361626914. The cubic root of 1643413453 is about 1180.0913108024.

The spelling of 1643413453 in words is "one billion, six hundred forty-three million, four hundred thirteen thousand, four hundred fifty-three".