1453138450781 has 2 divisors, whose sum is σ = 1453138450782. Its totient is φ = 1453138450780.

The previous prime is 1453138450763. The next prime is 1453138450877. The reversal of 1453138450781 is 1870548313541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809559060025 + 643579390756 = 899755^2 + 802234^2 .

It is a cyclic number.

It is not a de Polignac number, because 1453138450781 - 2¹⁰ = 1453138449757 is a prime.

It is a super-2 number, since 2×1453138450781² (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 (1453138450721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 726569225390 + 726569225391.

It is an arithmetic number, because the mean of its divisors is an integer number (726569225391).

Almost surely, 2^{1453138450781} is an apocalyptic number.

It is an amenable number.

1453138450781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1453138450781 is an equidigital number, since it uses as much as digits as its factorization.

1453138450781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 1453138450781 in words is "one trillion, four hundred fifty-three billion, one hundred thirty-eight million, four hundred fifty thousand, seven hundred eighty-one".