12170545400 has 96 divisors (see below), whose sum is σ = 30891095760. Its totient is φ = 4432112640.

The previous prime is 12170545393. The next prime is 12170545441. The reversal of 12170545400 is 454507121.

It is a super-2 number, since 2×12170545400² (a number of 21 digits) contains 22 as substring.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 157739 + ... + 221861.

Almost surely, 2^12170545400 is an apocalyptic number.

12170545400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12170545400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15445547880).

12170545400 is an abundant number, since it is smaller than the sum of its proper divisors (18720550360).

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

12170545400 is a wasteful number, since it uses less digits than its factorization.

12170545400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64225 (or 64216 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The spelling of 12170545400 in words is "twelve billion, one hundred seventy million, five hundred forty-five thousand, four hundred".