16351504129 has 3 divisors (see below), whose sum is σ = 16351632003. Its totient is φ = 16351376256.

The previous prime is 16351504097. The next prime is 16351504151. The reversal of 16351504129 is 92140515361.

The square root of 16351504129 is 127873.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92140515361 = 109 ⋅845325829.

It can be written as a sum of positive squares in only one way, i.e., 14384404225 + 1967099904 = 119935^2 + 44352^2 .

It is not a de Polignac number, because 16351504129 - 2⁵ = 16351504097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16351504189) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 63937 + ... + 191809.

It is an arithmetic number, because the mean of its divisors is an integer number (5450544001).

Almost surely, 2^16351504129 is an apocalyptic number.

16351504129 is the 127873-rd square number.

16351504129 is the 63937-th centered octagonal number.

It is an amenable number.

16351504129 is a deficient number, since it is larger than the sum of its proper divisors (127874).

16351504129 is an frugal number, since it uses more digits than its factorization.

16351504129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255746 (or 127873 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

Multiplying 16351504129 by its product of nonzero digits (32400), we get a square (529788733779600 = 23017140²).

The spelling of 16351504129 in words is "sixteen billion, three hundred fifty-one million, five hundred four thousand, one hundred twenty-nine".