8691123785338 has 4 divisors (see below), whose sum is σ = 13036685678010. Its totient is φ = 4345561892668.

The previous prime is 8691123785321. The next prime is 8691123785341. The reversal of 8691123785338 is 8335873211968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4489538035609 + 4201585749729 = 2118853^2 + 2049777^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8691123785338.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2172780946333 + ... + 2172780946336.

Almost surely, 2^{8691123785338} is an apocalyptic number.

8691123785338 is a deficient number, since it is larger than the sum of its proper divisors (4345561892672).

8691123785338 is a wasteful number, since it uses less digits than its factorization.

8691123785338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345561892671.

The product of its digits is 52254720, while the sum is 64.

The spelling of 8691123785338 in words is "eight trillion, six hundred ninety-one billion, one hundred twenty-three million, seven hundred eighty-five thousand, three hundred thirty-eight".