9779581138 has 8 divisors (see below), whose sum is σ = 14766520320. Its totient is φ = 4857407700.

The previous prime is 9779581127. The next prime is 9779581139. The reversal of 9779581138 is 8311859779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9779581139) 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, 16191058 + ... + 16191661.

It is an arithmetic number, because the mean of its divisors is an integer number (1845815040).

Almost surely, 2^9779581138 is an apocalyptic number.

9779581138 is a deficient number, since it is larger than the sum of its proper divisors (4986939182).

9779581138 is a wasteful number, since it uses less digits than its factorization.

9779581138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32382872.

The product of its digits is 3810240, while the sum is 58.

The square root of 9779581138 is about 98891.7647633007. The cubic root of 9779581138 is about 2138.4876741847.

The spelling of 9779581138 in words is "nine billion, seven hundred seventy-nine million, five hundred eighty-one thousand, one hundred thirty-eight".