16205961929 has 4 divisors (see below), whose sum is σ = 16252397700. Its totient is φ = 16159526160.

The previous prime is 16205961911. The next prime is 16205961931. The reversal of 16205961929 is 92916950261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7806606025 + 8399355904 = 88355^2 + 91648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16205961929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16205961949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23217362 + ... + 23218059.

It is an arithmetic number, because the mean of its divisors is an integer number (4063099425).

Almost surely, 2^16205961929 is an apocalyptic number.

It is an amenable number.

16205961929 is a deficient number, since it is larger than the sum of its proper divisors (46435771).

16205961929 is an equidigital number, since it uses as much as digits as its factorization.

16205961929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46435770.

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 16205961929 in words is "sixteen billion, two hundred five million, nine hundred sixty-one thousand, nine hundred twenty-nine".