12154439850 has 192 divisors, whose sum is σ = 37023630336. Its totient is φ = 2575457280.

The previous prime is 12154439849. The next prime is 12154439863. The reversal of 12154439850 is 5893445121.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1190869 + ... + 1201031.

It is an arithmetic number, because the mean of its divisors is an integer number (192831408).

Almost surely, 2^12154439850 is an apocalyptic number.

12154439850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12154439850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18511815168).

12154439850 is an abundant number, since it is smaller than the sum of its proper divisors (24869190486).

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

12154439850 is a wasteful number, since it uses less digits than its factorization.

12154439850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10269 (or 10264 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 12154439850 in words is "twelve billion, one hundred fifty-four million, four hundred thirty-nine thousand, eight hundred fifty".