16347051857 has 4 divisors (see below), whose sum is σ = 16577292096. Its totient is φ = 16116811620.

The previous prime is 16347051797. The next prime is 16347051859. The reversal of 16347051857 is 75815074361.

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 16347051857 - 2¹⁰ = 16347050833 is a prime.

It is a super-2 number, since 2×16347051857² (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 (16347051859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115120013 + ... + 115120154.

It is an arithmetic number, because the mean of its divisors is an integer number (4144323024).

Almost surely, 2^16347051857 is an apocalyptic number.

It is an amenable number.

16347051857 is a deficient number, since it is larger than the sum of its proper divisors (230240239).

16347051857 is an equidigital number, since it uses as much as digits as its factorization.

16347051857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230240238.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 16347051857 in words is "sixteen billion, three hundred forty-seven million, fifty-one thousand, eight hundred fifty-seven".