9171612438 has 16 divisors (see below), whose sum is σ = 19422238320. Its totient is φ = 2877368576.

The previous prime is 9171612431. The next prime is 9171612451. The reversal of 9171612438 is 8342161719.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9171612438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9171612431) 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, 44958783 + ... + 44958986.

It is an arithmetic number, because the mean of its divisors is an integer number (1213889895).

Almost surely, 2^9171612438 is an apocalyptic number.

9171612438 is an abundant number, since it is smaller than the sum of its proper divisors (10250625882).

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

9171612438 is a wasteful number, since it uses less digits than its factorization.

9171612438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89917791.

The product of its digits is 72576, while the sum is 42.

The square root of 9171612438 is about 95768.5357411295. The cubic root of 9171612438 is about 2093.2217154222.

The spelling of 9171612438 in words is "nine billion, one hundred seventy-one million, six hundred twelve thousand, four hundred thirty-eight".