1896405966437 has 2 divisors, whose sum is σ = 1896405966438. Its totient is φ = 1896405966436.

The previous prime is 1896405966391. The next prime is 1896405966451. The reversal of 1896405966437 is 7346695046981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1726159779556 + 170246186881 = 1313834^2 + 412609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1896405966437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1896405966457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948202983218 + 948202983219.

It is an arithmetic number, because the mean of its divisors is an integer number (948202983219).

Almost surely, 2^{1896405966437} is an apocalyptic number.

It is an amenable number.

1896405966437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1896405966437 is an equidigital number, since it uses as much as digits as its factorization.

1896405966437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235146240, while the sum is 68.

The spelling of 1896405966437 in words is "one trillion, eight hundred ninety-six billion, four hundred five million, nine hundred sixty-six thousand, four hundred thirty-seven".