9988739745 has 8 divisors (see below), whose sum is σ = 15981983616. Its totient is φ = 5327327856.

The previous prime is 9988739701. The next prime is 9988739777. The reversal of 9988739745 is 5479378899.

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

It is not a de Polignac number, because 9988739745 - 2⁶ = 9988739681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9988739745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332957977 + ... + 332958006.

It is an arithmetic number, because the mean of its divisors is an integer number (1997747952).

Almost surely, 2^9988739745 is an apocalyptic number.

It is an amenable number.

9988739745 is a deficient number, since it is larger than the sum of its proper divisors (5993243871).

9988739745 is a wasteful number, since it uses less digits than its factorization.

9988739745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665915991.

The product of its digits is 137168640, while the sum is 69.

The square root of 9988739745 is about 99943.6828669026. The cubic root of 9988739745 is about 2153.6257368555.

The spelling of 9988739745 in words is "nine billion, nine hundred eighty-eight million, seven hundred thirty-nine thousand, seven hundred forty-five".