1645134105 has 16 divisors (see below), whose sum is σ = 2633474880. Its totient is φ = 876984768.

The previous prime is 1645134079. The next prime is 1645134121. The reversal of 1645134105 is 5014315461.

It is a happy number.

It is not a de Polignac number, because 1645134105 - 2¹¹ = 1645132057 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7519 + ... + 57851.

It is an arithmetic number, because the mean of its divisors is an integer number (164592180).

Almost surely, 2^1645134105 is an apocalyptic number.

1645134105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1645134105 is a deficient number, since it is larger than the sum of its proper divisors (988340775).

1645134105 is a wasteful number, since it uses less digits than its factorization.

1645134105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52520.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1645134105 is about 40560.2527728810. The cubic root of 1645134105 is about 1180.5030185662.

Adding to 1645134105 its reverse (5014315461), we get a palindrome (6659449566).

The spelling of 1645134105 in words is "one billion, six hundred forty-five million, one hundred thirty-four thousand, one hundred five".