5515006661505 has 48 divisors (see below), whose sum is σ = 10494799159104. Its totient is φ = 2656911104640.

The previous prime is 5515006661491. The next prime is 5515006661623. The reversal of 5515006661505 is 5051666005155.

It is not a de Polignac number, because 5515006661505 - 2¹⁰ = 5515006660481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35404539 + ... + 35559968.

It is an arithmetic number, because the mean of its divisors is an integer number (218641649148).

Almost surely, 2^{5515006661505} is an apocalyptic number.

5515006661505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5515006661505 is a deficient number, since it is larger than the sum of its proper divisors (4979792497599).

5515006661505 is a wasteful number, since it uses less digits than its factorization.

5515006661505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70964686 (or 70964683 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 5515006661505 in words is "five trillion, five hundred fifteen billion, six million, six hundred sixty-one thousand, five hundred five".