5618448149 has 2 divisors, whose sum is σ = 5618448150. Its totient is φ = 5618448148.

The previous prime is 5618448137. The next prime is 5618448203. The reversal of 5618448149 is 9418448165.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4195800625 + 1422647524 = 64775^2 + 37718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5618448149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5618448097 and 5618448106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5618448449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2809224074 + 2809224075.

It is an arithmetic number, because the mean of its divisors is an integer number (2809224075).

Almost surely, 2^5618448149 is an apocalyptic number.

It is an amenable number.

5618448149 is a deficient number, since it is larger than the sum of its proper divisors (1).

5618448149 is an equidigital number, since it uses as much as digits as its factorization.

5618448149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 50.

The square root of 5618448149 is about 74956.3082668830. The cubic root of 5618448149 is about 1777.7558881305.

The spelling of 5618448149 in words is "five billion, six hundred eighteen million, four hundred forty-eight thousand, one hundred forty-nine".