645415002187 has 2 divisors, whose sum is σ = 645415002188. Its totient is φ = 645415002186.

The previous prime is 645415002101. The next prime is 645415002191. The reversal of 645415002187 is 781200514546.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645415002187 is a prime.

It is not a weakly prime, because it can be changed into another prime (645415002487) 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, 322707501093 + 322707501094.

It is an arithmetic number, because the mean of its divisors is an integer number (322707501094).

Almost surely, 2^645415002187 is an apocalyptic number.

645415002187 is a deficient number, since it is larger than the sum of its proper divisors (1).

645415002187 is an equidigital number, since it uses as much as digits as its factorization.

645415002187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 645415002187 in words is "six hundred forty-five billion, four hundred fifteen million, two thousand, one hundred eighty-seven".