1645112146 has 16 divisors (see below), whose sum is σ = 2529568800. Its totient is φ = 801991008.

The previous prime is 1645112137. The next prime is 1645112149. The reversal of 1645112146 is 6412115461.

It is not an unprimeable number, because it can be changed into a prime (1645112149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32125 + ... + 65743.

It is an arithmetic number, because the mean of its divisors is an integer number (158098050).

Almost surely, 2^1645112146 is an apocalyptic number.

1645112146 is a deficient number, since it is larger than the sum of its proper divisors (884456654).

1645112146 is a wasteful number, since it uses less digits than its factorization.

1645112146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34233.

The product of its digits is 5760, while the sum is 31.

The square root of 1645112146 is about 40559.9820759329. The cubic root of 1645112146 is about 1180.4977661512.

The spelling of 1645112146 in words is "one billion, six hundred forty-five million, one hundred twelve thousand, one hundred forty-six".