15548279249 has 2 divisors, whose sum is σ = 15548279250. Its totient is φ = 15548279248.

The previous prime is 15548279221. The next prime is 15548279251. The reversal of 15548279249 is 94297284551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9281973649 + 6266305600 = 96343^2 + 79160^2 .

It is a cyclic number.

It is not a de Polignac number, because 15548279249 - 2¹⁶ = 15548213713 is a prime.

Together with 15548279251, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15548279194 and 15548279203.

It is not a weakly prime, because it can be changed into another prime (15548279449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7774139624 + 7774139625.

It is an arithmetic number, because the mean of its divisors is an integer number (7774139625).

Almost surely, 2^15548279249 is an apocalyptic number.

It is an amenable number.

15548279249 is a deficient number, since it is larger than the sum of its proper divisors (1).

15548279249 is an equidigital number, since it uses as much as digits as its factorization.

15548279249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7257600, while the sum is 56.

The spelling of 15548279249 in words is "fifteen billion, five hundred forty-eight million, two hundred seventy-nine thousand, two hundred forty-nine".