15840220050 has 162 divisors, whose sum is σ = 45337931613. Its totient is φ = 3964193280.

The previous prime is 15840220049. The next prime is 15840220057. The reversal of 15840220050 is 5002204851.

It is a happy number.

15840220050 is a `hidden beast` number, since 1 + 5 + 8 + 402 + 200 + 50 = 666.

It can be written as a sum of positive squares in 14 ways, for example, as 2368671561 + 13471548489 = 48669^2 + 116067^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=88995.

It is a junction number, because it is equal to n+sod(n) for n = 15840219996 and 15840220023.

It is not an unprimeable number, because it can be changed into a prime (15840220057) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 45387276 + ... + 45387624.

Almost surely, 2^15840220050 is an apocalyptic number.

15840220050 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 15840220050

15840220050 is an abundant number, since it is smaller than the sum of its proper divisors (29497711563).

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

15840220050 is a wasteful number, since it uses less digits than its factorization.

15840220050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Multiplying 15840220050 by its product of nonzero digits (3200), we get a square (50688704160000 = 7119600²).

The spelling of 15840220050 in words is "fifteen billion, eight hundred forty million, two hundred twenty thousand, fifty".