16403717929 has 9 divisors (see below), whose sum is σ = 16509026781. Its totient is φ = 16299079020.

The previous prime is 16403717923. The next prime is 16403717933. The reversal of 16403717929 is 92971730461.

The square root of 16403717929 is 128077.

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

It is not a de Polignac number, because 16403717929 - 2⁹ = 16403717417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16403717923) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27023944 + ... + 27024550.

It is an arithmetic number, because the mean of its divisors is an integer number (1834336309).

Almost surely, 2^16403717929 is an apocalyptic number.

16403717929 is the 128077-th square number.

16403717929 is the 64039-th centered octagonal number.

It is an amenable number.

16403717929 is a deficient number, since it is larger than the sum of its proper divisors (105308852).

16403717929 is an frugal number, since it uses more digits than its factorization.

16403717929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

Multiplying 16403717929 by its sum of digits (49), we get a square (803782178521 = 896539²).

The spelling of 16403717929 in words is "sixteen billion, four hundred three million, seven hundred seventeen thousand, nine hundred twenty-nine".