16521544060426 has 4 divisors (see below), whose sum is σ = 24782316090642. Its totient is φ = 8260772030212.

The previous prime is 16521544060379. The next prime is 16521544060471. The reversal of 16521544060426 is 62406044512561.

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., 10048259670201 + 6473284390225 = 3169899^2 + 2544265^2 .

It is a super-2 number, since 2×16521544060426² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4130386015105 + ... + 4130386015108.

Almost surely, 2^{16521544060426} is an apocalyptic number.

16521544060426 is a deficient number, since it is larger than the sum of its proper divisors (8260772030216).

16521544060426 is an equidigital number, since it uses as much as digits as its factorization.

16521544060426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260772030215.

The product of its (nonzero) digits is 1382400, while the sum is 46.

Adding to 16521544060426 its reverse (62406044512561), we get a palindrome (78927588572987).

The spelling of 16521544060426 in words is "sixteen trillion, five hundred twenty-one billion, five hundred forty-four million, sixty thousand, four hundred twenty-six".