451375704171661 has 2 divisors, whose sum is σ = 451375704171662. Its totient is φ = 451375704171660.

The previous prime is 451375704171629. The next prime is 451375704171677. The reversal of 451375704171661 is 166171407573154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442832301303561 + 8543402868100 = 21043581^2 + 2922910^2 .

It is a cyclic number.

It is not a de Polignac number, because 451375704171661 - 2⁵ = 451375704171629 is a prime.

It is a super-3 number, since 3×451375704171661³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 451375704171596 and 451375704171605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451375704151661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225687852085830 + 225687852085831.

It is an arithmetic number, because the mean of its divisors is an integer number (225687852085831).

Almost surely, 2^{451375704171661} is an apocalyptic number.

It is an amenable number.

451375704171661 is a deficient number, since it is larger than the sum of its proper divisors (1).

451375704171661 is an equidigital number, since it uses as much as digits as its factorization.

451375704171661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14817600, while the sum is 58.

The spelling of 451375704171661 in words is "four hundred fifty-one trillion, three hundred seventy-five billion, seven hundred four million, one hundred seventy-one thousand, six hundred sixty-one".