645133060519 has 2 divisors, whose sum is σ = 645133060520. Its totient is φ = 645133060518.

The previous prime is 645133060511. The next prime is 645133060543. The reversal of 645133060519 is 915060331546.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645133060519 - 2³ = 645133060511 is a prime.

It is a super-2 number, since 2×645133060519² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645133060511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322566530259 + 322566530260.

It is an arithmetic number, because the mean of its divisors is an integer number (322566530260).

Almost surely, 2^645133060519 is an apocalyptic number.

645133060519 is a deficient number, since it is larger than the sum of its proper divisors (1).

645133060519 is an equidigital number, since it uses as much as digits as its factorization.

645133060519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 645133060519 in words is "six hundred forty-five billion, one hundred thirty-three million, sixty thousand, five hundred nineteen".