1645052112 has 160 divisors (see below), whose sum is σ = 5195560320. Its totient is φ = 498326400.

The previous prime is 1645052081. The next prime is 1645052137. The reversal of 1645052112 is 2112505461.

1645052112 is a `hidden beast` number, since 1 + 645 + 0 + 5 + 2 + 1 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573562 + ... + 576422.

It is an arithmetic number, because the mean of its divisors is an integer number (32472252).

Almost surely, 2^1645052112 is an apocalyptic number.

1645052112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645052112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597780160).

1645052112 is an abundant number, since it is smaller than the sum of its proper divisors (3550508208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645052112 is a wasteful number, since it uses less digits than its factorization.

1645052112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911 (or 2877 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1645052112 is about 40559.2420047515. The cubic root of 1645052112 is about 1180.4834062659.

Adding to 1645052112 its reverse (2112505461), we get a palindrome (3757557573).

The spelling of 1645052112 in words is "one billion, six hundred forty-five million, fifty-two thousand, one hundred twelve".