838461905453 has 2 divisors, whose sum is σ = 838461905454. Its totient is φ = 838461905452.

The previous prime is 838461905443. The next prime is 838461905459. The reversal of 838461905453 is 354509164838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711639026569 + 126822878884 = 843587^2 + 356122^2 .

It is a cyclic number.

It is not a de Polignac number, because 838461905453 - 2³⁶ = 769742428717 is a prime.

It is a super-2 number, since 2×838461905453² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838461905459) 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, 419230952726 + 419230952727.

It is an arithmetic number, because the mean of its divisors is an integer number (419230952727).

Almost surely, 2^838461905453 is an apocalyptic number.

It is an amenable number.

838461905453 is a deficient number, since it is larger than the sum of its proper divisors (1).

838461905453 is an equidigital number, since it uses as much as digits as its factorization.

838461905453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 838461905453 in words is "eight hundred thirty-eight billion, four hundred sixty-one million, nine hundred five thousand, four hundred fifty-three".