451131945969697 has 2 divisors, whose sum is σ = 451131945969698. Its totient is φ = 451131945969696.

The previous prime is 451131945969689. The next prime is 451131945969707. The reversal of 451131945969697 is 796969549131154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282961651103296 + 168170294866401 = 16821464^2 + 12968049^2 .

It is a cyclic number.

It is not a de Polignac number, because 451131945969697 - 2³ = 451131945969689 is a prime.

It is a super-2 number, since 2×451131945969697² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (451131945969647) 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, 225565972984848 + 225565972984849.

It is an arithmetic number, because the mean of its divisors is an integer number (225565972984849).

Almost surely, 2^{451131945969697} is an apocalyptic number.

It is an amenable number.

451131945969697 is a deficient number, since it is larger than the sum of its proper divisors (1).

451131945969697 is an equidigital number, since it uses as much as digits as its factorization.

451131945969697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1984046400, while the sum is 79.

The spelling of 451131945969697 in words is "four hundred fifty-one trillion, one hundred thirty-one billion, nine hundred forty-five million, nine hundred sixty-nine thousand, six hundred ninety-seven".