1645703952 has 20 divisors (see below), whose sum is σ = 4251402000. Its totient is φ = 548567968.

The previous prime is 1645703951. The next prime is 1645703963. The reversal of 1645703952 is 2593075461.

It is not an unprimeable number, because it can be changed into a prime (1645703951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17142702 + ... + 17142797.

It is an arithmetic number, because the mean of its divisors is an integer number (212570100).

Almost surely, 2^1645703952 is an apocalyptic number.

1645703952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1645703952 is an abundant number, since it is smaller than the sum of its proper divisors (2605698048).

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

1645703952 is a wasteful number, since it uses less digits than its factorization.

1645703952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34285510 (or 34285504 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 1645703952 is about 40567.2768620227. The cubic root of 1645703952 is about 1180.6393050134.

The spelling of 1645703952 in words is "one billion, six hundred forty-five million, seven hundred three thousand, nine hundred fifty-two".