16385617177 has 4 divisors (see below), whose sum is σ = 16386293520. Its totient is φ = 16384940836.

The previous prime is 16385617153. The next prime is 16385617231. The reversal of 16385617177 is 77171658361.

It is a happy number.

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-16385617177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16385617117) 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, 300427 + ... + 350752.

It is an arithmetic number, because the mean of its divisors is an integer number (4096573380).

Almost surely, 2^16385617177 is an apocalyptic number.

It is an amenable number.

16385617177 is a deficient number, since it is larger than the sum of its proper divisors (676343).

16385617177 is an equidigital number, since it uses as much as digits as its factorization.

16385617177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676342.

The product of its digits is 1481760, while the sum is 52.

The spelling of 16385617177 in words is "sixteen billion, three hundred eighty-five million, six hundred seventeen thousand, one hundred seventy-seven".