5451819091 has 2 divisors, whose sum is σ = 5451819092. Its totient is φ = 5451819090.

The previous prime is 5451819089. The next prime is 5451819119. The reversal of 5451819091 is 1909181545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5451819091 - 2¹ = 5451819089 is a prime.

Together with 5451819089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5451819001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2725909545 + 2725909546.

It is an arithmetic number, because the mean of its divisors is an integer number (2725909546).

Almost surely, 2^5451819091 is an apocalyptic number.

5451819091 is a deficient number, since it is larger than the sum of its proper divisors (1).

5451819091 is an equidigital number, since it uses as much as digits as its factorization.

5451819091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 43.

The square root of 5451819091 is about 73836.4347121392. The cubic root of 5451819091 is about 1760.0046370186.

The spelling of 5451819091 in words is "five billion, four hundred fifty-one million, eight hundred nineteen thousand, ninety-one".