645480151 has 2 divisors, whose sum is σ = 645480152. Its totient is φ = 645480150.

The previous prime is 645480149. The next prime is 645480161. The reversal of 645480151 is 151084546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645480151 - 2¹ = 645480149 is a prime.

Together with 645480149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645480131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322740075 + 322740076.

It is an arithmetic number, because the mean of its divisors is an integer number (322740076).

Almost surely, 2^645480151 is an apocalyptic number.

645480151 is a deficient number, since it is larger than the sum of its proper divisors (1).

645480151 is an equidigital number, since it uses as much as digits as its factorization.

645480151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 645480151 is about 25406.3014033920. The cubic root of 645480151 is about 864.2266026397.

The spelling of 645480151 in words is "six hundred forty-five million, four hundred eighty thousand, one hundred fifty-one".