451254910781 has 2 divisors, whose sum is σ = 451254910782. Its totient is φ = 451254910780.

The previous prime is 451254910739. The next prime is 451254910849. The reversal of 451254910781 is 187019452154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434656711225 + 16598199556 = 659285^2 + 128834^2 .

It is a cyclic number.

It is not a de Polignac number, because 451254910781 - 2²⁶ = 451187801917 is a prime.

It is a super-2 number, since 2×451254910781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451254918781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225627455390 + 225627455391.

It is an arithmetic number, because the mean of its divisors is an integer number (225627455391).

Almost surely, 2^451254910781 is an apocalyptic number.

It is an amenable number.

451254910781 is a deficient number, since it is larger than the sum of its proper divisors (1).

451254910781 is an equidigital number, since it uses as much as digits as its factorization.

451254910781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 451254910781 in words is "four hundred fifty-one billion, two hundred fifty-four million, nine hundred ten thousand, seven hundred eighty-one".