1645035336 has 192 divisors, whose sum is σ = 5291520000. Its totient is φ = 451785600.

The previous prime is 1645035323. The next prime is 1645035341. The reversal of 1645035336 is 6335305461.

1645035336 is a `hidden beast` number, since 1 + 645 + 0 + 3 + 5 + 3 + 3 + 6 = 666.

It is a super-2 number, since 2×1645035336² = 5412282513377265792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1645035336.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3296415 + ... + 3296913.

It is an arithmetic number, because the mean of its divisors is an integer number (27560000).

Almost surely, 2^1645035336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645035336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2645760000).

1645035336 is an abundant number, since it is smaller than the sum of its proper divisors (3646484664).

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

1645035336 is a wasteful number, since it uses less digits than its factorization.

1645035336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

The square root of 1645035336 is about 40559.0351956256. The cubic root of 1645035336 is about 1180.4793934535.

The spelling of 1645035336 in words is "one billion, six hundred forty-five million, thirty-five thousand, three hundred thirty-six".