15212544989 has 2 divisors, whose sum is σ = 15212544990. Its totient is φ = 15212544988.

The previous prime is 15212544983. The next prime is 15212545001. The reversal of 15212544989 is 98944521251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13585068025 + 1627476964 = 116555^2 + 40342^2 .

It is a cyclic number.

It is not a de Polignac number, because 15212544989 - 2⁴ = 15212544973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15212544983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606272494 + 7606272495.

It is an arithmetic number, because the mean of its divisors is an integer number (7606272495).

Almost surely, 2^15212544989 is an apocalyptic number.

It is an amenable number.

15212544989 is a deficient number, since it is larger than the sum of its proper divisors (1).

15212544989 is an equidigital number, since it uses as much as digits as its factorization.

15212544989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 50.

The spelling of 15212544989 in words is "fifteen billion, two hundred twelve million, five hundred forty-four thousand, nine hundred eighty-nine".