16123933961 has 4 divisors (see below), whose sum is σ = 16824974592. Its totient is φ = 15422893332.

The previous prime is 16123933939. The next prime is 16123933997. The reversal of 16123933961 is 16933932161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16123933961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16123933361) 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, 350520281 + ... + 350520326.

It is an arithmetic number, because the mean of its divisors is an integer number (4206243648).

Almost surely, 2^16123933961 is an apocalyptic number.

It is an amenable number.

16123933961 is a deficient number, since it is larger than the sum of its proper divisors (701040631).

16123933961 is an equidigital number, since it uses as much as digits as its factorization.

16123933961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701040630.

The product of its digits is 157464, while the sum is 44.

The spelling of 16123933961 in words is "sixteen billion, one hundred twenty-three million, nine hundred thirty-three thousand, nine hundred sixty-one".