16555551015 has 16 divisors (see below), whose sum is σ = 26746057728. Its totient is φ = 8743901856.

The previous prime is 16555550993. The next prime is 16555551017. The reversal of 16555551015 is 51015555561.

It is not a de Polignac number, because 16555551015 - 2⁷ = 16555550887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16555551017) 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 15 ways as a sum of consecutive naturals, for example, 5356239 + ... + 5359328.

It is an arithmetic number, because the mean of its divisors is an integer number (1671628608).

Almost surely, 2^16555551015 is an apocalyptic number.

16555551015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16555551015 is a deficient number, since it is larger than the sum of its proper divisors (10190506713).

16555551015 is a wasteful number, since it uses less digits than its factorization.

16555551015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10715678.

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 16555551015 in words is "sixteen billion, five hundred fifty-five million, five hundred fifty-one thousand, fifteen".