1936534738921 has 2 divisors, whose sum is σ = 1936534738922. Its totient is φ = 1936534738920.

The previous prime is 1936534738889. The next prime is 1936534738951. The reversal of 1936534738921 is 1298374356391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190619234025 + 745915504896 = 1091155^2 + 863664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1936534738921 - 2⁵ = 1936534738889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1936534738921.

It is not a weakly prime, because it can be changed into another prime (1936534738951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 968267369460 + 968267369461.

It is an arithmetic number, because the mean of its divisors is an integer number (968267369461).

Almost surely, 2^{1936534738921} is an apocalyptic number.

It is an amenable number.

1936534738921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1936534738921 is an equidigital number, since it uses as much as digits as its factorization.

1936534738921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 61.

The spelling of 1936534738921 in words is "one trillion, nine hundred thirty-six billion, five hundred thirty-four million, seven hundred thirty-eight thousand, nine hundred twenty-one".