1625150509 has 2 divisors, whose sum is σ = 1625150510. Its totient is φ = 1625150508.

The previous prime is 1625150507. The next prime is 1625150521. The reversal of 1625150509 is 9050515261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1324232100 + 300918409 = 36390^2 + 17347^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625150509 - 2¹ = 1625150507 is a prime.

It is a super-2 number, since 2×1625150509² = 5282228353805918162, which contains 22 as substring.

Together with 1625150507, 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 (1625150507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812575254 + 812575255.

It is an arithmetic number, because the mean of its divisors is an integer number (812575255).

Almost surely, 2^1625150509 is an apocalyptic number.

It is an amenable number.

1625150509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625150509 is an equidigital number, since it uses as much as digits as its factorization.

1625150509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 34.

The square root of 1625150509 is about 40313.1555326546. The cubic root of 1625150509 is about 1175.7036398714.

The spelling of 1625150509 in words is "one billion, six hundred twenty-five million, one hundred fifty thousand, five hundred nine".