1648325657 has 16 divisors (see below), whose sum is σ = 1849262400. Its totient is φ = 1456477440.

The previous prime is 1648325641. The next prime is 1648325671. The reversal of 1648325657 is 7565238461.

It is not a de Polignac number, because 1648325657 - 2⁴ = 1648325641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1648325057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43493 + ... + 72029.

It is an arithmetic number, because the mean of its divisors is an integer number (115578900).

Almost surely, 2^1648325657 is an apocalyptic number.

It is an amenable number.

1648325657 is a deficient number, since it is larger than the sum of its proper divisors (200936743).

1648325657 is a wasteful number, since it uses less digits than its factorization.

1648325657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28696.

The product of its digits is 1209600, while the sum is 47.

The square root of 1648325657 is about 40599.5770544473. The cubic root of 1648325657 is about 1181.2659154393.

The spelling of 1648325657 in words is "one billion, six hundred forty-eight million, three hundred twenty-five thousand, six hundred fifty-seven".