16731257305 has 32 divisors (see below), whose sum is σ = 23057768448. Its totient is φ = 11416977600.

The previous prime is 16731257299. The next prime is 16731257351. The reversal of 16731257305 is 50375213761.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-16731257305 is a prime.

It is a super-2 number, since 2×16731257305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10568544 + ... + 10570126.

It is an arithmetic number, because the mean of its divisors is an integer number (720555264).

Almost surely, 2^16731257305 is an apocalyptic number.

It is an amenable number.

16731257305 is a deficient number, since it is larger than the sum of its proper divisors (6326511143).

16731257305 is a wasteful number, since it uses less digits than its factorization.

16731257305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877.

The product of its (nonzero) digits is 132300, while the sum is 40.

The spelling of 16731257305 in words is "sixteen billion, seven hundred thirty-one million, two hundred fifty-seven thousand, three hundred five".