451338072169 has 2 divisors, whose sum is σ = 451338072170. Its totient is φ = 451338072168.

The previous prime is 451338072167. The next prime is 451338072223. The reversal of 451338072169 is 961270833154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313277522944 + 138060549225 = 559712^2 + 371565^2 .

It is a cyclic number.

It is not a de Polignac number, because 451338072169 - 2¹ = 451338072167 is a prime.

It is a super-2 number, since 2×451338072169² (a number of 24 digits) contains 22 as substring.

Together with 451338072167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (451338072167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225669036084 + 225669036085.

It is an arithmetic number, because the mean of its divisors is an integer number (225669036085).

It is a 1-persistent number, because it is pandigital, but 2⋅451338072169 = 902676144338 is not.

Almost surely, 2^451338072169 is an apocalyptic number.

It is an amenable number.

451338072169 is a deficient number, since it is larger than the sum of its proper divisors (1).

451338072169 is an equidigital number, since it uses as much as digits as its factorization.

451338072169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 451338072169 in words is "four hundred fifty-one billion, three hundred thirty-eight million, seventy-two thousand, one hundred sixty-nine".