15138212850 has 96 divisors (see below), whose sum is σ = 42144594240. Its totient is φ = 3995205120.

The previous prime is 15138212849. The next prime is 15138212863. The reversal of 15138212850 is 5821283151.

15138212850 is a `hidden beast` number, since 1 + 513 + 82 + 12 + 8 + 50 = 666.

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 47 ways as a sum of consecutive naturals, for example, 73149 + ... + 188751.

It is an arithmetic number, because the mean of its divisors is an integer number (439006190).

Almost surely, 2^15138212850 is an apocalyptic number.

15138212850 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 15138212850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21072297120).

15138212850 is an abundant number, since it is smaller than the sum of its proper divisors (27006381390).

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

15138212850 is a wasteful number, since it uses less digits than its factorization.

15138212850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115721 (or 115710 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The spelling of 15138212850 in words is "fifteen billion, one hundred thirty-eight million, two hundred twelve thousand, eight hundred fifty".