1648839481 has 4 divisors (see below), whose sum is σ = 1649870964. Its totient is φ = 1647808000.

The previous prime is 1648839463. The next prime is 1648839499. The reversal of 1648839481 is 1849388461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1849388461 = 317 ⋅5834033.

It is an interprime number because it is at equal distance from previous prime (1648839463) and next prime (1648839499).

It can be written as a sum of positive squares in 2 ways, for example, as 1388307600 + 260531881 = 37260^2 + 16141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648839481 - 2⁵ = 1648839449 is a prime.

It is a super-2 number, since 2×1648839481² = 5437343268208698722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1648839421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513340 + ... + 516541.

It is an arithmetic number, because the mean of its divisors is an integer number (412467741).

Almost surely, 2^1648839481 is an apocalyptic number.

It is an amenable number.

1648839481 is a deficient number, since it is larger than the sum of its proper divisors (1031483).

1648839481 is a wasteful number, since it uses less digits than its factorization.

1648839481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031482.

The product of its digits is 1327104, while the sum is 52.

The square root of 1648839481 is about 40605.9045090736. The cubic root of 1648839481 is about 1181.3886459846.

The spelling of 1648839481 in words is "one billion, six hundred forty-eight million, eight hundred thirty-nine thousand, four hundred eighty-one".