1575125012509 has 2 divisors, whose sum is σ = 1575125012510. Its totient is φ = 1575125012508.

The previous prime is 1575125012507. The next prime is 1575125012521. The reversal of 1575125012509 is 9052105215751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1555702409284 + 19422603225 = 1247278^2 + 139365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1575125012509 - 2¹ = 1575125012507 is a prime.

Together with 1575125012507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1575125012507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 787562506254 + 787562506255.

It is an arithmetic number, because the mean of its divisors is an integer number (787562506255).

Almost surely, 2^{1575125012509} is an apocalyptic number.

It is an amenable number.

1575125012509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1575125012509 is an equidigital number, since it uses as much as digits as its factorization.

1575125012509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157500, while the sum is 43.

The spelling of 1575125012509 in words is "one trillion, five hundred seventy-five billion, one hundred twenty-five million, twelve thousand, five hundred nine".