16537873561 has 24 divisors (see below), whose sum is σ = 18402697152. Its totient is φ = 14849762400.

The previous prime is 16537873553. The next prime is 16537873567.

16537873561 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 16537873561 - 2³ = 16537873553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16537873499 and 16537873508.

It is not an unprimeable number, because it can be changed into a prime (16537873567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3291231 + ... + 3296251.

It is an arithmetic number, because the mean of its divisors is an integer number (766779048).

Almost surely, 2^16537873561 is an apocalyptic number.

16537873561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16537873561 is a deficient number, since it is larger than the sum of its proper divisors (1864823591).

16537873561 is a wasteful number, since it uses less digits than its factorization.

16537873561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373 (or 5362 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 52.

It can be divided in two parts, 16537 and 873561, that added together give a palindrome (890098).

The spelling of 16537873561 in words is "sixteen billion, five hundred thirty-seven million, eight hundred seventy-three thousand, five hundred sixty-one".