1648349831 has 16 divisors (see below), whose sum is σ = 1730640384. Its totient is φ = 1568382144.

The previous prime is 1648349827. The next prime is 1648349837. The reversal of 1648349831 is 1389438461.

It is a cyclic number.

It is not a de Polignac number, because 1648349831 - 2² = 1648349827 is a prime.

It is a super-2 number, since 2×1648349831² = 5434114330715457122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648349837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456971 + ... + 460563.

It is an arithmetic number, because the mean of its divisors is an integer number (108165024).

Almost surely, 2^1648349831 is an apocalyptic number.

1648349831 is a deficient number, since it is larger than the sum of its proper divisors (82290553).

1648349831 is a wasteful number, since it uses less digits than its factorization.

1648349831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910.

The product of its digits is 497664, while the sum is 47.

The square root of 1648349831 is about 40599.8747658167. The cubic root of 1648349831 is about 1181.2716901442.

The spelling of 1648349831 in words is "one billion, six hundred forty-eight million, three hundred forty-nine thousand, eight hundred thirty-one".