16193800957 has 4 divisors (see below), whose sum is σ = 16198483356. Its totient is φ = 16189118560.

The previous prime is 16193800951. The next prime is 16193800981. The reversal of 16193800957 is 75900839161.

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 1664150436 + 14529650521 = 40794^2 + 120539^2 .

It is a cyclic number.

It is not a de Polignac number, because 16193800957 - 2²⁷ = 16059583229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16193800957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16193800951) 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, 2336008 + ... + 2342929.

It is an arithmetic number, because the mean of its divisors is an integer number (4049620839).

Almost surely, 2^16193800957 is an apocalyptic number.

It is an amenable number.

16193800957 is a deficient number, since it is larger than the sum of its proper divisors (4682399).

16193800957 is an equidigital number, since it uses as much as digits as its factorization.

16193800957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682398.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 16193800957 in words is "sixteen billion, one hundred ninety-three million, eight hundred thousand, nine hundred fifty-seven".