5178540667 has 4 divisors (see below), whose sum is σ = 5178941056. Its totient is φ = 5178140280.

The previous prime is 5178540637. The next prime is 5178540709. The reversal of 5178540667 is 7660458715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5178540667 - 2⁷ = 5178540539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5178540667.

It is not an unprimeable number, because it can be changed into a prime (5178540637) 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, 180123 + ... + 206884.

It is an arithmetic number, because the mean of its divisors is an integer number (1294735264).

Almost surely, 2^5178540667 is an apocalyptic number.

5178540667 is a deficient number, since it is larger than the sum of its proper divisors (400389).

5178540667 is a wasteful number, since it uses less digits than its factorization.

5178540667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400388.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The square root of 5178540667 is about 71962.0779786132. The cubic root of 5178540667 is about 1730.0917307993.

The spelling of 5178540667 in words is "five billion, one hundred seventy-eight million, five hundred forty thousand, six hundred sixty-seven".