16556323523122 has 4 divisors (see below), whose sum is σ = 24834485284686. Its totient is φ = 8278161761560.

The previous prime is 16556323523119. The next prime is 16556323523123. The reversal of 16556323523122 is 22132532365561.

It is a happy number.

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., 14951670494121 + 1604653029001 = 3866739^2 + 1266749^2 .

It is a super-2 number, since 2×16556323523122² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16556323523123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4139080880779 + ... + 4139080880782.

Almost surely, 2^{16556323523122} is an apocalyptic number.

16556323523122 is a deficient number, since it is larger than the sum of its proper divisors (8278161761564).

16556323523122 is an equidigital number, since it uses as much as digits as its factorization.

16556323523122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8278161761563.

The product of its digits is 1944000, while the sum is 46.

Adding to 16556323523122 its reverse (22132532365561), we get a palindrome (38688855888683).

The spelling of 16556323523122 in words is "sixteen trillion, five hundred fifty-six billion, three hundred twenty-three million, five hundred twenty-three thousand, one hundred twenty-two".