9181144238 has 16 divisors (see below), whose sum is σ = 15821512704. Its totient is φ = 3914174040.

The previous prime is 9181144237. The next prime is 9181144241. The reversal of 9181144238 is 8324411819.

It is a junction number, because it is equal to n+sod(n) for n = 9181144195 and 9181144204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9181144237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1714070 + ... + 1719417.

It is an arithmetic number, because the mean of its divisors is an integer number (988844544).

Almost surely, 2^9181144238 is an apocalyptic number.

9181144238 is a deficient number, since it is larger than the sum of its proper divisors (6640368466).

9181144238 is a wasteful number, since it uses less digits than its factorization.

9181144238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433687.

The product of its digits is 55296, while the sum is 41.

The square root of 9181144238 is about 95818.2875968883. The cubic root of 9181144238 is about 2093.9466065999.

The spelling of 9181144238 in words is "nine billion, one hundred eighty-one million, one hundred forty-four thousand, two hundred thirty-eight".