15412856609 has 2 divisors, whose sum is σ = 15412856610. Its totient is φ = 15412856608.

The previous prime is 15412856603. The next prime is 15412856633. The reversal of 15412856609 is 90665821451.

15412856609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11013453025 + 4399403584 = 104945^2 + 66328^2 .

It is a cyclic number.

It is not a de Polignac number, because 15412856609 - 2¹² = 15412852513 is a prime.

It is a super-2 number, since 2×15412856609² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15412856603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7706428304 + 7706428305.

It is an arithmetic number, because the mean of its divisors is an integer number (7706428305).

Almost surely, 2^15412856609 is an apocalyptic number.

It is an amenable number.

15412856609 is a deficient number, since it is larger than the sum of its proper divisors (1).

15412856609 is an equidigital number, since it uses as much as digits as its factorization.

15412856609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 15412856609 in words is "fifteen billion, four hundred twelve million, eight hundred fifty-six thousand, six hundred nine".