1648932565 has 48 divisors (see below), whose sum is σ = 2388716784. Its totient is φ = 1088640000.

The previous prime is 1648932539. The next prime is 1648932569. The reversal of 1648932565 is 5652398461.

It can be written as a sum of positive squares in 8 ways, for example, as 94128804 + 1554803761 = 9702^2 + 39431^2 .

It is not a de Polignac number, because 1648932565 - 2¹³ = 1648924373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648932569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 914665 + ... + 916465.

It is an arithmetic number, because the mean of its divisors is an integer number (49764933).

Almost surely, 2^1648932565 is an apocalyptic number.

It is an amenable number.

1648932565 is a deficient number, since it is larger than the sum of its proper divisors (739784219).

1648932565 is a wasteful number, since it uses less digits than its factorization.

1648932565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958 (or 1951 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 49.

The square root of 1648932565 is about 40607.0506808855. The cubic root of 1648932565 is about 1181.4108770371.

The spelling of 1648932565 in words is "one billion, six hundred forty-eight million, nine hundred thirty-two thousand, five hundred sixty-five".