16334448557 has 16 divisors (see below), whose sum is σ = 19194384000. Its totient is φ = 13894040160.

The previous prime is 16334448553. The next prime is 16334448577. The reversal of 16334448557 is 75584443361.

It is not a de Polignac number, because 16334448557 - 2² = 16334448553 is a prime.

It is a super-2 number, since 2×16334448557² (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 (16334448551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136832 + ... + 226697.

It is an arithmetic number, because the mean of its divisors is an integer number (1199649000).

Almost surely, 2^16334448557 is an apocalyptic number.

It is an amenable number.

16334448557 is a deficient number, since it is larger than the sum of its proper divisors (2859935443).

16334448557 is an equidigital number, since it uses as much as digits as its factorization.

16334448557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363681 (or 363667 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 50.

The spelling of 16334448557 in words is "sixteen billion, three hundred thirty-four million, four hundred forty-eight thousand, five hundred fifty-seven".