645079234147 has 2 divisors, whose sum is σ = 645079234148. Its totient is φ = 645079234146.

The previous prime is 645079234133. The next prime is 645079234181. The reversal of 645079234147 is 741432970546.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645079234147 - 2¹¹ = 645079232099 is a prime.

It is a super-2 number, since 2×645079234147² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645079234094 and 645079234103.

It is not a weakly prime, because it can be changed into another prime (645079234447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322539617073 + 322539617074.

It is an arithmetic number, because the mean of its divisors is an integer number (322539617074).

Almost surely, 2^645079234147 is an apocalyptic number.

645079234147 is a deficient number, since it is larger than the sum of its proper divisors (1).

645079234147 is an equidigital number, since it uses as much as digits as its factorization.

645079234147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 645079234147 in words is "six hundred forty-five billion, seventy-nine million, two hundred thirty-four thousand, one hundred forty-seven".