1648548731 has 2 divisors, whose sum is σ = 1648548732. Its totient is φ = 1648548730.

The previous prime is 1648548719. The next prime is 1648548779. The reversal of 1648548731 is 1378458461.

It is a weak prime.

It is an emirp because it is prime and its reverse (1378458461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648548731 is a prime.

It is a super-2 number, since 2×1648548731² = 5435425836963420722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1648548631) 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 as a sum of consecutive naturals, namely, 824274365 + 824274366.

It is an arithmetic number, because the mean of its divisors is an integer number (824274366).

Almost surely, 2^1648548731 is an apocalyptic number.

1648548731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648548731 is an equidigital number, since it uses as much as digits as its factorization.

1648548731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 47.

The square root of 1648548731 is about 40602.3242068727. The cubic root of 1648548731 is about 1181.3192013955.

The spelling of 1648548731 in words is "one billion, six hundred forty-eight million, five hundred forty-eight thousand, seven hundred thirty-one".