215251079616 has 168 divisors, whose sum is σ = 667649184384. Its totient is φ = 68630664960.

The previous prime is 215251079599. The next prime is 215251079651. The reversal of 215251079616 is 616970152512.

It is a happy number.

215251079616 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 510 + 79 + 61 + 6 = 666.

215251079616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 56811 + ... + 658581.

It is an arithmetic number, because the mean of its divisors is an integer number (3974102288).

Almost surely, 2^215251079616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215251079616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333824592192).

215251079616 is an abundant number, since it is smaller than the sum of its proper divisors (452398104768).

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

215251079616 is an equidigital number, since it uses as much as digits as its factorization.

215251079616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601821 (or 601799 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 215251079616 in words is "two hundred fifteen billion, two hundred fifty-one million, seventy-nine thousand, six hundred sixteen".