215413420668 has 24 divisors (see below), whose sum is σ = 504542467968. Its totient is φ = 71531451696.

The previous prime is 215413420637. The next prime is 215413420751. The reversal of 215413420668 is 866024314512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34124446 + ... + 34130757.

It is an arithmetic number, because the mean of its divisors is an integer number (21022602832).

Almost surely, 2^215413420668 is an apocalyptic number.

It is an amenable number.

215413420668 is an abundant number, since it is smaller than the sum of its proper divisors (289129047300).

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

215413420668 is a wasteful number, since it uses less digits than its factorization.

215413420668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68255473 (or 68255471 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 215413420668 in words is "two hundred fifteen billion, four hundred thirteen million, four hundred twenty thousand, six hundred sixty-eight".