16236815609172 has 48 divisors (see below), whose sum is σ = 40807337500160. Its totient is φ = 5008173232608.

The previous prime is 16236815609171. The next prime is 16236815609213. The reversal of 16236815609172 is 27190651863261.

It is a super-2 number, since 2×16236815609172² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16236815609171) 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, 828061168 + ... + 828080775.

Almost surely, 2^{16236815609172} is an apocalyptic number.

16236815609172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16236815609172 is an abundant number, since it is smaller than the sum of its proper divisors (24570521890988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16236815609172 is a wasteful number, since it uses less digits than its factorization.

16236815609172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656142012 (or 1656142010 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 16236815609172 in words is "sixteen trillion, two hundred thirty-six billion, eight hundred fifteen million, six hundred nine thousand, one hundred seventy-two".