999999148058509 has 2 divisors, whose sum is σ = 999999148058510. Its totient is φ = 999999148058508.

The previous prime is 999999148058453. The next prime is 999999148058527. The reversal of 999999148058509 is 905850841999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969534378198409 + 30464769860100 = 31137347^2 + 5519490^2 .

It is a cyclic number.

It is not a de Polignac number, because 999999148058509 - 2²⁵ = 999999114504077 is a prime.

It is a super-2 number, since 2×999999148058509² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999148058569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999574029254 + 499999574029255.

It is an arithmetic number, because the mean of its divisors is an integer number (499999574029255).

Almost surely, 2^{999999148058509} is an apocalyptic number.

It is an amenable number.

999999148058509 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999148058509 is an equidigital number, since it uses as much as digits as its factorization.

999999148058509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30611001600, while the sum is 94.

The spelling of 999999148058509 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, one hundred forty-eight million, fifty-eight thousand, five hundred nine".