4019845964557 has 2 divisors, whose sum is σ = 4019845964558. Its totient is φ = 4019845964556.

The previous prime is 4019845964551. The next prime is 4019845964669. The reversal of 4019845964557 is 7554695489104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4006158368521 + 13687596036 = 2001539^2 + 116994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4019845964557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4019845964492 and 4019845964501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4019845964551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2009922982278 + 2009922982279.

It is an arithmetic number, because the mean of its divisors is an integer number (2009922982279).

Almost surely, 2^{4019845964557} is an apocalyptic number.

It is an amenable number.

4019845964557 is a deficient number, since it is larger than the sum of its proper divisors (1).

4019845964557 is an equidigital number, since it uses as much as digits as its factorization.

4019845964557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728000, while the sum is 67.

The spelling of 4019845964557 in words is "four trillion, nineteen billion, eight hundred forty-five million, nine hundred sixty-four thousand, five hundred fifty-seven".