9957406517 has 4 divisors (see below), whose sum is σ = 10093809420. Its totient is φ = 9821003616.

The previous prime is 9957406423. The next prime is 9957406519. The reversal of 9957406517 is 7156047599.

9957406517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6375862801 + 3581543716 = 79849^2 + 59846^2 .

It is a cyclic number.

It is not a de Polignac number, because 9957406517 - 2¹² = 9957402421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9957406519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68201342 + ... + 68201487.

It is an arithmetic number, because the mean of its divisors is an integer number (2523452355).

Almost surely, 2^9957406517 is an apocalyptic number.

It is an amenable number.

9957406517 is a deficient number, since it is larger than the sum of its proper divisors (136402903).

9957406517 is a wasteful number, since it uses less digits than its factorization.

9957406517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136402902.

The product of its (nonzero) digits is 2381400, while the sum is 53.

The square root of 9957406517 is about 99786.8053251531. The cubic root of 9957406517 is about 2151.3715076082.

The spelling of 9957406517 in words is "nine billion, nine hundred fifty-seven million, four hundred six thousand, five hundred seventeen".