215996953738 has 8 divisors (see below), whose sum is σ = 324004915332. Its totient is φ = 107995315296.

The previous prime is 215996953727. The next prime is 215996953789. The reversal of 215996953738 is 837359699512.

215996953738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 210558923689 + 5438030049 = 458867^2 + 73743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1494445 + ... + 1632592.

Almost surely, 2^215996953738 is an apocalyptic number.

215996953738 is a deficient number, since it is larger than the sum of its proper divisors (108007961594).

215996953738 is a wasteful number, since it uses less digits than its factorization.

215996953738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161576.

The product of its digits is 110224800, while the sum is 67.

The spelling of 215996953738 in words is "two hundred fifteen billion, nine hundred ninety-six million, nine hundred fifty-three thousand, seven hundred thirty-eight".