16643468106555 has 8 divisors (see below), whose sum is σ = 26629548970512. Its totient is φ = 8876516323488.

The previous prime is 16643468106547. The next prime is 16643468106563. The reversal of 16643468106555 is 55560186434661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16643468106547) and next prime (16643468106563).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16643468106555 - 2³ = 16643468106547 is a prime.

It is a super-2 number, since 2×16643468106555² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554782270204 + ... + 554782270233.

It is an arithmetic number, because the mean of its divisors is an integer number (3328693621314).

Almost surely, 2^{16643468106555} is an apocalyptic number.

16643468106555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16643468106555 is a deficient number, since it is larger than the sum of its proper divisors (9986080863957).

16643468106555 is a wasteful number, since it uses less digits than its factorization.

16643468106555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109564540445.

The product of its (nonzero) digits is 62208000, while the sum is 60.

The spelling of 16643468106555 in words is "sixteen trillion, six hundred forty-three billion, four hundred sixty-eight million, one hundred six thousand, five hundred fifty-five".