9139835642 has 24 divisors (see below), whose sum is σ = 15957538740. Its totient is φ = 3914749440.

The previous prime is 9139835603. The next prime is 9139835659. The reversal of 9139835642 is 2465389319.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6176230921 + 2963604721 = 78589^2 + 54439^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143834 + ... + 197402.

Almost surely, 2^9139835642 is an apocalyptic number.

9139835642 is a deficient number, since it is larger than the sum of its proper divisors (6817703098).

9139835642 is a wasteful number, since it uses less digits than its factorization.

9139835642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55326 (or 55319 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 50.

The square root of 9139835642 is about 95602.4876349983. The cubic root of 9139835642 is about 2090.8014631833.

The spelling of 9139835642 in words is "nine billion, one hundred thirty-nine million, eight hundred thirty-five thousand, six hundred forty-two".