16393770331 has 4 divisors (see below), whose sum is σ = 16922601664. Its totient is φ = 15864939000.

The previous prime is 16393770307. The next prime is 16393770347. The reversal of 16393770331 is 13307739361.

16393770331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13307739361 = 7 ⋅1901105623.

It is a cyclic number.

It is not a de Polignac number, because 16393770331 - 2⁵ = 16393770299 is a prime.

It is a super-2 number, since 2×16393770331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16393770391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264415620 + ... + 264415681.

It is an arithmetic number, because the mean of its divisors is an integer number (4230650416).

Almost surely, 2^16393770331 is an apocalyptic number.

16393770331 is a deficient number, since it is larger than the sum of its proper divisors (528831333).

16393770331 is an equidigital number, since it uses as much as digits as its factorization.

16393770331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528831332.

The product of its (nonzero) digits is 214326, while the sum is 43.

The spelling of 16393770331 in words is "sixteen billion, three hundred ninety-three million, seven hundred seventy thousand, three hundred thirty-one".