215652895380 has 288 divisors, whose sum is σ = 717720232320. Its totient is φ = 52088417280.

The previous prime is 215652895363. The next prime is 215652895417. The reversal of 215652895380 is 83598256512.

It is a happy number.

215652895380 is a `hidden beast` number, since 2 + 1 + 56 + 52 + 8 + 9 + 538 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

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, 101196915 + ... + 101199045.

It is an arithmetic number, because the mean of its divisors is an integer number (2492084140).

Almost surely, 2^215652895380 is an apocalyptic number.

215652895380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215652895380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358860116160).

215652895380 is an abundant number, since it is smaller than the sum of its proper divisors (502067336940).

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

215652895380 is a wasteful number, since it uses less digits than its factorization.

215652895380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951 (or 2946 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 215652895380 in words is "two hundred fifteen billion, six hundred fifty-two million, eight hundred ninety-five thousand, three hundred eighty".