645421162151 has 2 divisors, whose sum is σ = 645421162152. Its totient is φ = 645421162150.

The previous prime is 645421162117. The next prime is 645421162163. The reversal of 645421162151 is 151261124546.

645421162151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645421162151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645421162051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322710581075 + 322710581076.

It is an arithmetic number, because the mean of its divisors is an integer number (322710581076).

Almost surely, 2^645421162151 is an apocalyptic number.

645421162151 is a deficient number, since it is larger than the sum of its proper divisors (1).

645421162151 is an equidigital number, since it uses as much as digits as its factorization.

645421162151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

Adding to 645421162151 its reverse (151261124546), we get a palindrome (796682286697).

The spelling of 645421162151 in words is "six hundred forty-five billion, four hundred twenty-one million, one hundred sixty-two thousand, one hundred fifty-one".