215401741668 has 96 divisors (see below), whose sum is σ = 613399449600. Its totient is φ = 65064127392.

The previous prime is 215401741663. The next prime is 215401741699. The reversal of 215401741668 is 866147104512.

215401741668 is a `hidden beast` number, since 2 + 1 + 540 + 1 + 7 + 41 + 6 + 68 = 666.

It is not an unprimeable number, because it can be changed into a prime (215401741663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2234796 + ... + 2329187.

It is an arithmetic number, because the mean of its divisors is an integer number (6389577600).

Almost surely, 2^215401741668 is an apocalyptic number.

It is an amenable number.

215401741668 is an abundant number, since it is smaller than the sum of its proper divisors (397997707932).

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

215401741668 is a wasteful number, since it uses less digits than its factorization.

215401741668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564038 (or 4564030 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 215401741668 in words is "two hundred fifteen billion, four hundred one million, seven hundred forty-one thousand, six hundred sixty-eight".