15516551255055 has 32 divisors (see below), whose sum is σ = 24881376222144. Its totient is φ = 8257208272896.

The previous prime is 15516551255039. The next prime is 15516551255099. The reversal of 15516551255055 is 55055215561551.

It is not a de Polignac number, because 15516551255055 - 2⁴ = 15516551255039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15516551254989 and 15516551255007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19809849 + ... + 20578221.

It is an arithmetic number, because the mean of its divisors is an integer number (777543006942).

Almost surely, 2^{15516551255055} is an apocalyptic number.

15516551255055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15516551255055 is a deficient number, since it is larger than the sum of its proper divisors (9364824967089).

15516551255055 is a wasteful number, since it uses less digits than its factorization.

15516551255055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771355.

The product of its (nonzero) digits is 4687500, while the sum is 51.

The spelling of 15516551255055 in words is "fifteen trillion, five hundred sixteen billion, five hundred fifty-one million, two hundred fifty-five thousand, fifty-five".