16957813645 has 16 divisors (see below), whose sum is σ = 20887792560. Its totient is φ = 13211712000.

The previous prime is 16957813643. The next prime is 16957813669. The reversal of 16957813645 is 54631875961.

It can be written as a sum of positive squares in 8 ways, for example, as 224580196 + 16733233449 = 14986^2 + 129357^2 .

It is not a de Polignac number, because 16957813645 - 2¹ = 16957813643 is a prime.

It is a super-3 number, since 3×16957813645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16957813643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244440 + ... + 306049.

It is an arithmetic number, because the mean of its divisors is an integer number (1305487035).

Almost surely, 2^16957813645 is an apocalyptic number.

It is an amenable number.

16957813645 is a deficient number, since it is larger than the sum of its proper divisors (3929978915).

16957813645 is a wasteful number, since it uses less digits than its factorization.

16957813645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550656.

The product of its digits is 5443200, while the sum is 55.

The spelling of 16957813645 in words is "sixteen billion, nine hundred fifty-seven million, eight hundred thirteen thousand, six hundred forty-five".