15975047609 has 2 divisors, whose sum is σ = 15975047610. Its totient is φ = 15975047608.

The previous prime is 15975047597. The next prime is 15975047633. The reversal of 15975047609 is 90674057951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12275975209 + 3699072400 = 110797^2 + 60820^2 .

It is a cyclic number.

It is not a de Polignac number, because 15975047609 - 2⁸ = 15975047353 is a prime.

It is a super-2 number, since 2×15975047609² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15975047659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7987523804 + 7987523805.

It is an arithmetic number, because the mean of its divisors is an integer number (7987523805).

Almost surely, 2^15975047609 is an apocalyptic number.

It is an amenable number.

15975047609 is a deficient number, since it is larger than the sum of its proper divisors (1).

15975047609 is an equidigital number, since it uses as much as digits as its factorization.

15975047609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2381400, while the sum is 53.

The spelling of 15975047609 in words is "fifteen billion, nine hundred seventy-five million, forty-seven thousand, six hundred nine".