7173865538 has 16 divisors (see below), whose sum is σ = 12299164800. Its totient is φ = 3074236416.

The previous prime is 7173865537. The next prime is 7173865553. The reversal of 7173865538 is 8355683717.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7173865538.

It is not an unprimeable number, because it can be changed into a prime (7173865537) 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, 244163 + ... + 271961.

It is an arithmetic number, because the mean of its divisors is an integer number (768697800).

Almost surely, 2^7173865538 is an apocalyptic number.

7173865538 is a deficient number, since it is larger than the sum of its proper divisors (5125299262).

7173865538 is a wasteful number, since it uses less digits than its factorization.

7173865538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46241.

The product of its digits is 4233600, while the sum is 53.

The square root of 7173865538 is about 84698.6749483131. The cubic root of 7173865538 is about 1928.6395898658.

The spelling of 7173865538 in words is "seven billion, one hundred seventy-three million, eight hundred sixty-five thousand, five hundred thirty-eight".