9991701755 has 16 divisors (see below), whose sum is σ = 13704733440. Its totient is φ = 6850538592.

The previous prime is 9991701701. The next prime is 9991701773. The reversal of 9991701755 is 5571071999.

It is a cyclic number.

It is not a de Polignac number, because 9991701755 - 2¹⁰ = 9991700731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9991701697 and 9991701706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345152 + ... + 372978.

It is an arithmetic number, because the mean of its divisors is an integer number (856545840).

Almost surely, 2^9991701755 is an apocalyptic number.

9991701755 is a deficient number, since it is larger than the sum of its proper divisors (3713031685).

9991701755 is a wasteful number, since it uses less digits than its factorization.

9991701755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38098.

The product of its (nonzero) digits is 893025, while the sum is 53.

The square root of 9991701755 is about 99958.5001638180. The cubic root of 9991701755 is about 2153.8385908858.

The spelling of 9991701755 in words is "nine billion, nine hundred ninety-one million, seven hundred one thousand, seven hundred fifty-five".