1648028881 has 2 divisors, whose sum is σ = 1648028882. Its totient is φ = 1648028880.

The previous prime is 1648028857. The next prime is 1648028891. The reversal of 1648028881 is 1888208461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1612745281 + 35283600 = 40159^2 + 5940^2 .

It is an emirp because it is prime and its reverse (1888208461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1648028881 - 2¹⁷ = 1647897809 is a prime.

It is a super-2 number, since 2×1648028881² = 5431998385220224322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1648028891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824014440 + 824014441.

It is an arithmetic number, because the mean of its divisors is an integer number (824014441).

Almost surely, 2^1648028881 is an apocalyptic number.

It is an amenable number.

1648028881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648028881 is an equidigital number, since it uses as much as digits as its factorization.

1648028881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196608, while the sum is 46.

The square root of 1648028881 is about 40595.9219749965. The cubic root of 1648028881 is about 1181.1950167441.

The spelling of 1648028881 in words is "one billion, six hundred forty-eight million, twenty-eight thousand, eight hundred eighty-one".