451273378933409 has 2 divisors, whose sum is σ = 451273378933410. Its totient is φ = 451273378933408.

The previous prime is 451273378933397. The next prime is 451273378933459. The reversal of 451273378933409 is 904339873372154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351713453700625 + 99559925232784 = 18754025^2 + 9977972^2 .

It is a cyclic number.

It is not a de Polignac number, because 451273378933409 - 2¹⁶ = 451273378867873 is a prime.

It is a super-2 number, since 2×451273378933409² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (451273378933459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225636689466704 + 225636689466705.

It is an arithmetic number, because the mean of its divisors is an integer number (225636689466705).

Almost surely, 2^{451273378933409} is an apocalyptic number.

It is an amenable number.

451273378933409 is a deficient number, since it is larger than the sum of its proper divisors (1).

451273378933409 is an equidigital number, since it uses as much as digits as its factorization.

451273378933409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 411505920, while the sum is 68.

The spelling of 451273378933409 in words is "four hundred fifty-one trillion, two hundred seventy-three billion, three hundred seventy-eight million, nine hundred thirty-three thousand, four hundred nine".