5515006661249 has 8 divisors (see below), whose sum is σ = 5573931696360. Its totient is φ = 5456166352000.

The previous prime is 5515006661237. The next prime is 5515006661257. The reversal of 5515006661249 is 9421666005155.

It can be written as a sum of positive squares in 4 ways, for example, as 1694310945649 + 3820695715600 = 1301657^2 + 1954660^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5515006661249 - 2²⁰ = 5515005612673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5515006661197 and 5515006661206.

It is not an unprimeable number, because it can be changed into a prime (5515006661209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21050582 + ... + 21310959.

It is an arithmetic number, because the mean of its divisors is an integer number (696741462045).

Almost surely, 2^{5515006661249} is an apocalyptic number.

It is an amenable number.

5515006661249 is a deficient number, since it is larger than the sum of its proper divisors (58925035111).

5515006661249 is a wasteful number, since it uses less digits than its factorization.

5515006661249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42362931.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 5515006661249 in words is "five trillion, five hundred fifteen billion, six million, six hundred sixty-one thousand, two hundred forty-nine".