16394067761 has 4 divisors (see below), whose sum is σ = 16459383024. Its totient is φ = 16328752500.

The previous prime is 16394067743. The next prime is 16394067763. The reversal of 16394067761 is 16776049361.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16776049361 = 17 ⋅986826433.

It is a cyclic number.

It is not a de Polignac number, because 16394067761 - 2¹⁰ = 16394066737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16394067763) 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, 32657255 + ... + 32657756.

It is an arithmetic number, because the mean of its divisors is an integer number (4114845756).

Almost surely, 2^16394067761 is an apocalyptic number.

It is an amenable number.

16394067761 is a deficient number, since it is larger than the sum of its proper divisors (65315263).

16394067761 is an equidigital number, since it uses as much as digits as its factorization.

16394067761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65315262.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The spelling of 16394067761 in words is "sixteen billion, three hundred ninety-four million, sixty-seven thousand, seven hundred sixty-one".