16166573554 has 4 divisors (see below), whose sum is σ = 24249860334. Its totient is φ = 8083286776.

The previous prime is 16166573543. The next prime is 16166573573. The reversal of 16166573554 is 45537566161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12549152529 + 3617421025 = 112023^2 + 60145^2 .

It is a super-2 number, since 2×16166573554² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16166573498 and 16166573507.

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 as a sum of consecutive naturals, namely, 4041643387 + ... + 4041643390.

Almost surely, 2^16166573554 is an apocalyptic number.

16166573554 is a deficient number, since it is larger than the sum of its proper divisors (8083286780).

16166573554 is an equidigital number, since it uses as much as digits as its factorization.

16166573554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8083286779.

The product of its digits is 2268000, while the sum is 49.

The spelling of 16166573554 in words is "sixteen billion, one hundred sixty-six million, five hundred seventy-three thousand, five hundred fifty-four".