1645443134 has 4 divisors (see below), whose sum is σ = 2468164704. Its totient is φ = 822721566.

The previous prime is 1645443133. The next prime is 1645443139. The reversal of 1645443134 is 4313445461.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1645443094 and 1645443103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645443131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411360782 + ... + 411360785.

It is an arithmetic number, because the mean of its divisors is an integer number (617041176).

Almost surely, 2^1645443134 is an apocalyptic number.

1645443134 is a deficient number, since it is larger than the sum of its proper divisors (822721570).

1645443134 is an equidigital number, since it uses as much as digits as its factorization.

1645443134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822721569.

The product of its digits is 69120, while the sum is 35.

The square root of 1645443134 is about 40564.0620993509. The cubic root of 1645443134 is about 1180.5769308441.

Adding to 1645443134 its reverse (4313445461), we get a palindrome (5958888595).

The spelling of 1645443134 in words is "one billion, six hundred forty-five million, four hundred forty-three thousand, one hundred thirty-four".