15448742849 has 2 divisors, whose sum is σ = 15448742850. Its totient is φ = 15448742848.

The previous prime is 15448742839. The next prime is 15448742861. The reversal of 15448742849 is 94824784451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12261575824 + 3187167025 = 110732^2 + 56455^2 .

It is a cyclic number.

It is not a de Polignac number, because 15448742849 - 2¹⁶ = 15448677313 is a prime.

It is a super-2 number, since 2×15448742849² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15448742794 and 15448742803.

It is not a weakly prime, because it can be changed into another prime (15448742839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7724371424 + 7724371425.

It is an arithmetic number, because the mean of its divisors is an integer number (7724371425).

Almost surely, 2^15448742849 is an apocalyptic number.

It is an amenable number.

15448742849 is a deficient number, since it is larger than the sum of its proper divisors (1).

15448742849 is an equidigital number, since it uses as much as digits as its factorization.

15448742849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10321920, while the sum is 56.

The spelling of 15448742849 in words is "fifteen billion, four hundred forty-eight million, seven hundred forty-two thousand, eight hundred forty-nine".