645602426039 has 2 divisors, whose sum is σ = 645602426040. Its totient is φ = 645602426038.

The previous prime is 645602426017. The next prime is 645602426101. The reversal of 645602426039 is 930624206546.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645602426039 - 2¹² = 645602421943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645602425984 and 645602426002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645602426939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322801213019 + 322801213020.

It is an arithmetic number, because the mean of its divisors is an integer number (322801213020).

Almost surely, 2^645602426039 is an apocalyptic number.

645602426039 is a deficient number, since it is larger than the sum of its proper divisors (1).

645602426039 is an equidigital number, since it uses as much as digits as its factorization.

645602426039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 645602426039 in words is "six hundred forty-five billion, six hundred two million, four hundred twenty-six thousand, thirty-nine".