1938905164523 has 2 divisors, whose sum is σ = 1938905164524. Its totient is φ = 1938905164522.

The previous prime is 1938905164519. The next prime is 1938905164577. The reversal of 1938905164523 is 3254615098391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1938905164523 - 2² = 1938905164519 is a prime.

It is not a weakly prime, because it can be changed into another prime (1938905664523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969452582261 + 969452582262.

It is an arithmetic number, because the mean of its divisors is an integer number (969452582262).

Almost surely, 2^{1938905164523} is an apocalyptic number.

1938905164523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938905164523 is an equidigital number, since it uses as much as digits as its factorization.

1938905164523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 1938905164523 in words is "one trillion, nine hundred thirty-eight billion, nine hundred five million, one hundred sixty-four thousand, five hundred twenty-three".