16554423267643 has 16 divisors (see below), whose sum is σ = 17666636958720. Its totient is φ = 15457595682816.

The previous prime is 16554423267623. The next prime is 16554423267649. The reversal of 16554423267643 is 34676232445561.

It is a cyclic number.

It is not a de Polignac number, because 16554423267643 - 2²¹ = 16554421170491 is a prime.

It is a super-2 number, since 2×16554423267643² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16554423267649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166774155 + ... + 166873387.

It is an arithmetic number, because the mean of its divisors is an integer number (1104164809920).

Almost surely, 2^{16554423267643} is an apocalyptic number.

16554423267643 is a deficient number, since it is larger than the sum of its proper divisors (1112213691077).

16554423267643 is a wasteful number, since it uses less digits than its factorization.

16554423267643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176646.

The product of its digits is 87091200, while the sum is 58.

The spelling of 16554423267643 in words is "sixteen trillion, five hundred fifty-four billion, four hundred twenty-three million, two hundred sixty-seven thousand, six hundred forty-three".