16315123355009 has 2 divisors, whose sum is σ = 16315123355010. Its totient is φ = 16315123355008.

The previous prime is 16315123354987. The next prime is 16315123355023. The reversal of 16315123355009 is 90055332151361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10499887564609 + 5815235790400 = 3240353^2 + 2411480^2 .

It is a cyclic number.

It is not a de Polignac number, because 16315123355009 - 2⁴⁰ = 15215611727233 is a prime.

It is not a weakly prime, because it can be changed into another prime (16315123355059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8157561677504 + 8157561677505.

It is an arithmetic number, because the mean of its divisors is an integer number (8157561677505).

Almost surely, 2^{16315123355009} is an apocalyptic number.

It is an amenable number.

16315123355009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16315123355009 is an equidigital number, since it uses as much as digits as its factorization.

16315123355009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 364500, while the sum is 44.

The spelling of 16315123355009 in words is "sixteen trillion, three hundred fifteen billion, one hundred twenty-three million, three hundred fifty-five thousand, nine".