215205662421616 has 40 divisors (see below), whose sum is σ = 440052254853120. Its totient is φ = 101673363612096.

The previous prime is 215205662421613. The next prime is 215205662421683. The reversal of 215205662421616 is 616124266502512.

It is a self number, because there is not a number n which added to its sum of digits gives 215205662421616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215205662421613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924052450 + ... + 924285313.

It is an arithmetic number, because the mean of its divisors is an integer number (11001306371328).

Almost surely, 2^{215205662421616} is an apocalyptic number.

It is an amenable number.

215205662421616 is an abundant number, since it is smaller than the sum of its proper divisors (224846592431504).

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

215205662421616 is a wasteful number, since it uses less digits than its factorization.

215205662421616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848338173 (or 1848338167 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 215205662421616 in words is "two hundred fifteen trillion, two hundred five billion, six hundred sixty-two million, four hundred twenty-one thousand, six hundred sixteen".