15516551055105 has 20 divisors (see below), whose sum is σ = 27814854484692. Its totient is φ = 8275493895840.

The previous prime is 15516551055077. The next prime is 15516551055107. The reversal of 15516551055105 is 50155015561551.

15516551055105 is a `hidden beast` number, since 15 + 5 + 1 + 65 + 510 + 55 + 10 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4686501917889 + 10830049137216 = 2164833^2 + 3290904^2 .

It is not a de Polignac number, because 15516551055105 - 2¹² = 15516551051009 is a prime.

It is a super-2 number, since 2×15516551055105² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (15516551055107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19156235466 + ... + 19156236275.

Almost surely, 2^{15516551055105} is an apocalyptic number.

15516551055105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15516551055105 is a deficient number, since it is larger than the sum of its proper divisors (12298303429587).

15516551055105 is an equidigital number, since it uses as much as digits as its factorization.

15516551055105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38312471758 (or 38312471749 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 45.

The spelling of 15516551055105 in words is "fifteen trillion, five hundred sixteen billion, five hundred fifty-one million, fifty-five thousand, one hundred five".