5172672138 has 32 divisors (see below), whose sum is σ = 11121546240. Its totient is φ = 1598718960.

The previous prime is 5172672031. The next prime is 5172672139. The reversal of 5172672138 is 8312762715.

It is a self number, because there is not a number n which added to its sum of digits gives 5172672138.

It is not an unprimeable number, because it can be changed into a prime (5172672139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477348 + ... + 488063.

It is an arithmetic number, because the mean of its divisors is an integer number (347548320).

Almost surely, 2^5172672138 is an apocalyptic number.

5172672138 is an abundant number, since it is smaller than the sum of its proper divisors (5948874102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5172672138 is a wasteful number, since it uses less digits than its factorization.

5172672138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965482.

The product of its digits is 141120, while the sum is 42.

The square root of 5172672138 is about 71921.2912703881. The cubic root of 5172672138 is about 1729.4379474357.

The spelling of 5172672138 in words is "five billion, one hundred seventy-two million, six hundred seventy-two thousand, one hundred thirty-eight".