16555457475 has 18 divisors (see below), whose sum is σ = 29652664236. Its totient is φ = 8829577200.

The previous prime is 16555457459. The next prime is 16555457533. The reversal of 16555457475 is 57475455561.

16555457475 is a `hidden beast` number, since 1 + 6 + 55 + 545 + 7 + 47 + 5 = 666.

It is not a de Polignac number, because 16555457475 - 2⁴ = 16555457459 is a prime.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 36789681 + ... + 36790130.

Almost surely, 2^16555457475 is an apocalyptic number.

16555457475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16555457475 is a deficient number, since it is larger than the sum of its proper divisors (13097206761).

16555457475 is a wasteful number, since it uses less digits than its factorization.

16555457475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73579827 (or 73579819 counting only the distinct ones).

The product of its digits is 14700000, while the sum is 54.

The spelling of 16555457475 in words is "sixteen billion, five hundred fifty-five million, four hundred fifty-seven thousand, four hundred seventy-five".