1648497945 has 16 divisors (see below), whose sum is σ = 2641242240. Its totient is φ = 877983744.

The previous prime is 1648497941. The next prime is 1648497997. The reversal of 1648497945 is 5497948461.

It is not a de Polignac number, because 1648497945 - 2² = 1648497941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1648497941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64680 + ... + 86489.

It is an arithmetic number, because the mean of its divisors is an integer number (165077640).

Almost surely, 2^1648497945 is an apocalyptic number.

1648497945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1648497945 is a deficient number, since it is larger than the sum of its proper divisors (992744295).

1648497945 is a wasteful number, since it uses less digits than its factorization.

1648497945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151904.

The product of its digits is 8709120, while the sum is 57.

The square root of 1648497945 is about 40601.6987945086. The cubic root of 1648497945 is about 1181.3070705049.

The spelling of 1648497945 in words is "one billion, six hundred forty-eight million, four hundred ninety-seven thousand, nine hundred forty-five".