215950641408 has 144 divisors (see below), whose sum is σ = 672215185600. Its totient is φ = 68194897920.

The previous prime is 215950641397. The next prime is 215950641409. The reversal of 215950641408 is 804146059512.

215950641408 is a `hidden beast` number, since 2 + 159 + 50 + 6 + 41 + 408 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (215950641409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690853 + ... + 953508.

Almost surely, 2^215950641408 is an apocalyptic number.

It is an amenable number.

215950641408 is an abundant number, since it is smaller than the sum of its proper divisors (456264544192).

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

215950641408 is a wasteful number, since it uses less digits than its factorization.

215950641408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644405 (or 1644385 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 215950641408 in words is "two hundred fifteen billion, nine hundred fifty million, six hundred forty-one thousand, four hundred eight".