5451256169 has 2 divisors, whose sum is σ = 5451256170. Its totient is φ = 5451256168.

The previous prime is 5451256127. The next prime is 5451256171. The reversal of 5451256169 is 9616521545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4710763225 + 740492944 = 68635^2 + 27212^2 .

It is a cyclic number.

It is not a de Polignac number, because 5451256169 - 2¹² = 5451252073 is a prime.

It is a super-2 number, since 2×5451256169² = 59432387640121113122, which contains 22 as substring.

Together with 5451256171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5451250169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2725628084 + 2725628085.

It is an arithmetic number, because the mean of its divisors is an integer number (2725628085).

Almost surely, 2^5451256169 is an apocalyptic number.

It is an amenable number.

5451256169 is a deficient number, since it is larger than the sum of its proper divisors (1).

5451256169 is an equidigital number, since it uses as much as digits as its factorization.

5451256169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 44.

The square root of 5451256169 is about 73832.6226609891. The cubic root of 5451256169 is about 1759.9440591078.

The spelling of 5451256169 in words is "five billion, four hundred fifty-one million, two hundred fifty-six thousand, one hundred sixty-nine".