1645776352 has 96 divisors (see below), whose sum is σ = 3791733120. Its totient is φ = 695185920.

The previous prime is 1645776323. The next prime is 1645776397. The reversal of 1645776352 is 2536775461.

It is a congruent 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, 352143 + ... + 356785.

It is an arithmetic number, because the mean of its divisors is an integer number (39497220).

Almost surely, 2^1645776352 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 1645776352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895866560).

1645776352 is an abundant number, since it is smaller than the sum of its proper divisors (2145956768).

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

1645776352 is a wasteful number, since it uses less digits than its factorization.

1645776352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736 (or 4728 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 46.

The square root of 1645776352 is about 40568.1691970441. The cubic root of 1645776352 is about 1180.6566181784.

The spelling of 1645776352 in words is "one billion, six hundred forty-five million, seven hundred seventy-six thousand, three hundred fifty-two".