215488668068 has 12 divisors (see below), whose sum is σ = 399287826252. Its totient is φ = 101406432000.

The previous prime is 215488668053. The next prime is 215488668107. The reversal of 215488668068 is 860866884512.

It can be written as a sum of positive squares in 2 ways, for example, as 166294315264 + 49194352804 = 407792^2 + 221798^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215488668068.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1584475433 + ... + 1584475568.

It is an arithmetic number, because the mean of its divisors is an integer number (33273985521).

Almost surely, 2^215488668068 is an apocalyptic number.

It is an amenable number.

215488668068 is a deficient number, since it is larger than the sum of its proper divisors (183799158184).

215488668068 is a wasteful number, since it uses less digits than its factorization.

215488668068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168951022 (or 3168951020 counting only the distinct ones).

The product of its (nonzero) digits is 35389440, while the sum is 62.

The spelling of 215488668068 in words is "two hundred fifteen billion, four hundred eighty-eight million, six hundred sixty-eight thousand, sixty-eight".