215061025650 has 192 divisors, whose sum is σ = 566694681600. Its totient is φ = 53823294720.

The previous prime is 215061025603. The next prime is 215061025651. The reversal of 215061025650 is 56520160512.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215061025651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 234015891 + ... + 234016809.

It is an arithmetic number, because the mean of its divisors is an integer number (2951534800).

Almost surely, 2^215061025650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215061025650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283347340800).

215061025650 is an abundant number, since it is smaller than the sum of its proper divisors (351633655950).

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

215061025650 is a wasteful number, since it uses less digits than its factorization.

215061025650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 215061025650 in words is "two hundred fifteen billion, sixty-one million, twenty-five thousand, six hundred fifty".