9178982157 has 4 divisors (see below), whose sum is σ = 12238642880. Its totient is φ = 6119321436.

The previous prime is 9178982147. The next prime is 9178982161. The reversal of 9178982157 is 7512898719.

9178982157 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7512898719 = 3 ⋅2504299573.

It is not a de Polignac number, because 9178982157 - 2¹⁵ = 9178949389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9178982097 and 9178982106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9178982147) 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, 1529830357 + ... + 1529830362.

It is an arithmetic number, because the mean of its divisors is an integer number (3059660720).

Almost surely, 2^9178982157 is an apocalyptic number.

It is an amenable number.

9178982157 is a deficient number, since it is larger than the sum of its proper divisors (3059660723).

9178982157 is a wasteful number, since it uses less digits than its factorization.

9178982157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059660722.

The product of its digits is 2540160, while the sum is 57.

The square root of 9178982157 is about 95807.0047386933. The cubic root of 9178982157 is about 2093.7822248525.

The spelling of 9178982157 in words is "nine billion, one hundred seventy-eight million, nine hundred eighty-two thousand, one hundred fifty-seven".