451373721797 has 2 divisors, whose sum is σ = 451373721798. Its totient is φ = 451373721796.

The previous prime is 451373721793. The next prime is 451373721829. The reversal of 451373721797 is 797127373154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338530803556 + 112842918241 = 581834^2 + 335921^2 .

It is a cyclic number.

It is not a de Polignac number, because 451373721797 - 2² = 451373721793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451373721793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225686860898 + 225686860899.

It is an arithmetic number, because the mean of its divisors is an integer number (225686860899).

Almost surely, 2^451373721797 is an apocalyptic number.

It is an amenable number.

451373721797 is a deficient number, since it is larger than the sum of its proper divisors (1).

451373721797 is an equidigital number, since it uses as much as digits as its factorization.

451373721797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7779240, while the sum is 56.

The spelling of 451373721797 in words is "four hundred fifty-one billion, three hundred seventy-three million, seven hundred twenty-one thousand, seven hundred ninety-seven".