16202161693 has 4 divisors (see below), whose sum is σ = 16244911840. Its totient is φ = 16159411548.

The previous prime is 16202161673. The next prime is 16202161711. The reversal of 16202161693 is 39616120261.

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 not a de Polignac number, because 16202161693 - 2²⁵ = 16168607261 is a prime.

It is a super-2 number, since 2×16202161693² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16202161673) 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, 21374505 + ... + 21375262.

It is an arithmetic number, because the mean of its divisors is an integer number (4061227960).

Almost surely, 2^16202161693 is an apocalyptic number.

It is an amenable number.

16202161693 is a deficient number, since it is larger than the sum of its proper divisors (42750147).

16202161693 is an equidigital number, since it uses as much as digits as its factorization.

16202161693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42750146.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 16202161693 in words is "sixteen billion, two hundred two million, one hundred sixty-one thousand, six hundred ninety-three".