16477123018 has 4 divisors (see below), whose sum is σ = 24715684530. Its totient is φ = 8238561508.

The previous prime is 16477122997. The next prime is 16477123021. The reversal of 16477123018 is 81032177461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81032177461 = 83621 ⋅969041.

It can be written as a sum of positive squares in only one way, i.e., 16079000809 + 398122209 = 126803^2 + 19953^2 .

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, 4119280753 + ... + 4119280756.

Almost surely, 2^16477123018 is an apocalyptic number.

16477123018 is a deficient number, since it is larger than the sum of its proper divisors (8238561512).

16477123018 is an equidigital number, since it uses as much as digits as its factorization.

16477123018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8238561511.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 16477123018 in words is "sixteen billion, four hundred seventy-seven million, one hundred twenty-three thousand, eighteen".