12154436900 has 18 divisors (see below), whose sum is σ = 26375128290. Its totient is φ = 4861774720.

The previous prime is 12154436897. The next prime is 12154436951. The reversal of 12154436900 is 963445121.

It can be written as a sum of positive squares in 3 ways, for example, as 1660073536 + 10494363364 = 40744^2 + 102442^2 .

It is a super-2 number, since 2×12154436900² (a number of 21 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 60772085 + ... + 60772284.

It is an arithmetic number, because the mean of its divisors is an integer number (1465284905).

Almost surely, 2^12154436900 is an apocalyptic number.

12154436900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12154436900 is an abundant number, since it is smaller than the sum of its proper divisors (14220691390).

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

12154436900 is a wasteful number, since it uses less digits than its factorization.

12154436900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121544383 (or 121544376 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 12154436900 in words is "twelve billion, one hundred fifty-four million, four hundred thirty-six thousand, nine hundred".