2615998849 has 2 divisors, whose sum is σ = 2615998850. Its totient is φ = 2615998848.

The previous prime is 2615998823. The next prime is 2615998871. The reversal of 2615998849 is 9488995162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1759383025 + 856615824 = 41945^2 + 29268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2615998849 - 2¹⁵ = 2615966081 is a prime.

It is not a weakly prime, because it can be changed into another prime (2615998349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1307999424 + 1307999425.

It is an arithmetic number, because the mean of its divisors is an integer number (1307999425).

Almost surely, 2^2615998849 is an apocalyptic number.

It is an amenable number.

2615998849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2615998849 is an equidigital number, since it uses as much as digits as its factorization.

2615998849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11197440, while the sum is 61.

The square root of 2615998849 is about 51146.8361582611. The cubic root of 2615998849 is about 1377.8835528210.

The spelling of 2615998849 in words is "two billion, six hundred fifteen million, nine hundred ninety-eight thousand, eight hundred forty-nine".