12154532311400 has 96 divisors (see below), whose sum is σ = 28477692936000. Its totient is φ = 4824244838400.

The previous prime is 12154532311399. The next prime is 12154532311403. The reversal of 12154532311400 is 411323545121.

It is not an unprimeable number, because it can be changed into a prime (12154532311403) 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, 472870949 + ... + 472896651.

It is an arithmetic number, because the mean of its divisors is an integer number (296642634750).

Almost surely, 2^{12154532311400} is an apocalyptic number.

12154532311400 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 12154532311400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14238846468000).

12154532311400 is an abundant number, since it is smaller than the sum of its proper divisors (16323160624600).

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

12154532311400 is a wasteful number, since it uses less digits than its factorization.

12154532311400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43899 (or 43890 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 12154532311400 its reverse (411323545121), we get a palindrome (12565855856521).

The spelling of 12154532311400 in words is "twelve trillion, one hundred fifty-four billion, five hundred thirty-two million, three hundred eleven thousand, four hundred".