645252387463 has 2 divisors, whose sum is σ = 645252387464. Its totient is φ = 645252387462.

The previous prime is 645252387397. The next prime is 645252387581. The reversal of 645252387463 is 364783252546.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645252387463 - 2¹³ = 645252379271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645252387163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322626193731 + 322626193732.

It is an arithmetic number, because the mean of its divisors is an integer number (322626193732).

Almost surely, 2^645252387463 is an apocalyptic number.

645252387463 is a deficient number, since it is larger than the sum of its proper divisors (1).

645252387463 is an equidigital number, since it uses as much as digits as its factorization.

645252387463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 55.

The spelling of 645252387463 in words is "six hundred forty-five billion, two hundred fifty-two million, three hundred eighty-seven thousand, four hundred sixty-three".