1645454147 has 2 divisors, whose sum is σ = 1645454148. Its totient is φ = 1645454146.

The previous prime is 1645454137. The next prime is 1645454159. The reversal of 1645454147 is 7414545461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1645454147 - 2²⁶ = 1578345283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1645454137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822727073 + 822727074.

It is an arithmetic number, because the mean of its divisors is an integer number (822727074).

Almost surely, 2^1645454147 is an apocalyptic number.

1645454147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645454147 is an equidigital number, since it uses as much as digits as its factorization.

1645454147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 41.

The square root of 1645454147 is about 40564.1978473629. The cubic root of 1645454147 is about 1180.5795647171.

The spelling of 1645454147 in words is "one billion, six hundred forty-five million, four hundred fifty-four thousand, one hundred forty-seven".