15120324450 has 864 divisors, whose sum is σ = 57754607040. Its totient is φ = 2786918400.

The previous prime is 15120324421. The next prime is 15120324451. The reversal of 15120324450 is 5442302151.

15120324450 is a `hidden beast` number, since 1 + 5 + 1 + 203 + 2 + 4 + 450 = 666.

It is a super-2 number, since 2×15120324450² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15120324451) by changing a digit.

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 431 ways as a sum of consecutive naturals, for example, 78343554 + ... + 78343746.

It is an arithmetic number, because the mean of its divisors is an integer number (66845610).

Almost surely, 2^15120324450 is an apocalyptic number.

15120324450 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 15120324450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28877303520).

15120324450 is an abundant number, since it is smaller than the sum of its proper divisors (42634282590).

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

15120324450 is a wasteful number, since it uses less digits than its factorization.

15120324450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 15120324450 in words is "fifteen billion, one hundred twenty million, three hundred twenty-four thousand, four hundred fifty".