1615018349249 has 2 divisors, whose sum is σ = 1615018349250. Its totient is φ = 1615018349248.

The previous prime is 1615018349221. The next prime is 1615018349251. The reversal of 1615018349249 is 9429438105161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1353930052225 + 261088297024 = 1163585^2 + 510968^2 .

It is a cyclic number.

It is not a de Polignac number, because 1615018349249 - 2¹² = 1615018345153 is a prime.

Together with 1615018349251, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1615018349249.

It is not a weakly prime, because it can be changed into another prime (1615018349279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807509174624 + 807509174625.

It is an arithmetic number, because the mean of its divisors is an integer number (807509174625).

Almost surely, 2^{1615018349249} is an apocalyptic number.

It is an amenable number.

1615018349249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615018349249 is an equidigital number, since it uses as much as digits as its factorization.

1615018349249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 1615018349249 in words is "one trillion, six hundred fifteen billion, eighteen million, three hundred forty-nine thousand, two hundred forty-nine".