9957123438167 has 4 divisors (see below), whose sum is σ = 9957735560136. Its totient is φ = 9956511316200.

The previous prime is 9957123438121. The next prime is 9957123438253. The reversal of 9957123438167 is 7618343217599.

9957123438167 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 is a cyclic number.

It is not a de Polignac number, because 9957123438167 - 2¹⁴ = 9957123421783 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 (9957123438107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306036584 + ... + 306069117.

It is an arithmetic number, because the mean of its divisors is an integer number (2489433890034).

Almost surely, 2^{9957123438167} is an apocalyptic number.

9957123438167 is a deficient number, since it is larger than the sum of its proper divisors (612121969).

9957123438167 is a wasteful number, since it uses less digits than its factorization.

9957123438167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612121968.

The product of its digits is 68584320, while the sum is 65.

The spelling of 9957123438167 in words is "nine trillion, nine hundred fifty-seven billion, one hundred twenty-three million, four hundred thirty-eight thousand, one hundred sixty-seven".