645125001527 has 2 divisors, whose sum is σ = 645125001528. Its totient is φ = 645125001526.

The previous prime is 645125001431. The next prime is 645125001533. The reversal of 645125001527 is 725100521546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645125001527 - 2¹⁸ = 645124739383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645125001727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322562500763 + 322562500764.

It is an arithmetic number, because the mean of its divisors is an integer number (322562500764).

Almost surely, 2^645125001527 is an apocalyptic number.

645125001527 is a deficient number, since it is larger than the sum of its proper divisors (1).

645125001527 is an equidigital number, since it uses as much as digits as its factorization.

645125001527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 38.

The spelling of 645125001527 in words is "six hundred forty-five billion, one hundred twenty-five million, one thousand, five hundred twenty-seven".