9216371638 has 4 divisors (see below), whose sum is σ = 13824557460. Its totient is φ = 4608185818.

The previous prime is 9216371603. The next prime is 9216371639. The reversal of 9216371638 is 8361736129.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8361736129 = 32077 ⋅260677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9216371639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304092908 + ... + 2304092911.

It is an arithmetic number, because the mean of its divisors is an integer number (3456139365).

Almost surely, 2^9216371638 is an apocalyptic number.

9216371638 is a deficient number, since it is larger than the sum of its proper divisors (4608185822).

9216371638 is a wasteful number, since it uses less digits than its factorization.

9216371638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608185821.

The product of its digits is 326592, while the sum is 46.

The square root of 9216371638 is about 96001.9355950702. The cubic root of 9216371638 is about 2096.6212969064.

The spelling of 9216371638 in words is "nine billion, two hundred sixteen million, three hundred seventy-one thousand, six hundred thirty-eight".