1916648057 has 2 divisors, whose sum is σ = 1916648058. Its totient is φ = 1916648056.

The previous prime is 1916648011. The next prime is 1916648117. The reversal of 1916648057 is 7508466191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990297961 + 926350096 = 31469^2 + 30436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1916648057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1916648557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958324028 + 958324029.

It is an arithmetic number, because the mean of its divisors is an integer number (958324029).

Almost surely, 2^1916648057 is an apocalyptic number.

It is an amenable number.

1916648057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916648057 is an equidigital number, since it uses as much as digits as its factorization.

1916648057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1916648057 is about 43779.5392506591. The cubic root of 1916648057 is about 1242.1692986915.

The spelling of 1916648057 in words is "one billion, nine hundred sixteen million, six hundred forty-eight thousand, fifty-seven".