451513357661 has 2 divisors, whose sum is σ = 451513357662. Its totient is φ = 451513357660.

The previous prime is 451513357619. The next prime is 451513357667. The reversal of 451513357661 is 166753315154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406668942436 + 44844415225 = 637706^2 + 211765^2 .

It is a cyclic number.

It is not a de Polignac number, because 451513357661 - 2¹⁴ = 451513341277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451513357667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225756678830 + 225756678831.

It is an arithmetic number, because the mean of its divisors is an integer number (225756678831).

Almost surely, 2^451513357661 is an apocalyptic number.

It is an amenable number.

451513357661 is a deficient number, since it is larger than the sum of its proper divisors (1).

451513357661 is an equidigital number, since it uses as much as digits as its factorization.

451513357661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 47.

The spelling of 451513357661 in words is "four hundred fifty-one billion, five hundred thirteen million, three hundred fifty-seven thousand, six hundred sixty-one".