5178857645 has 64 divisors (see below), whose sum is σ = 7539194880. Its totient is φ = 3373498368.

The previous prime is 5178857597. The next prime is 5178857653. The reversal of 5178857645 is 5467588715.

It is a cyclic number.

It is not a de Polignac number, because 5178857645 - 2²⁸ = 4910422189 is a prime.

It is a super-3 number, since 3×5178857645³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2035244 + ... + 2037786.

It is an arithmetic number, because the mean of its divisors is an integer number (117799920).

Almost surely, 2^5178857645 is an apocalyptic number.

It is an amenable number.

5178857645 is a deficient number, since it is larger than the sum of its proper divisors (2360337235).

5178857645 is a wasteful number, since it uses less digits than its factorization.

5178857645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694.

The product of its digits is 9408000, while the sum is 56.

The square root of 5178857645 is about 71964.2803410136. The cubic root of 5178857645 is about 1730.1270296646.

The spelling of 5178857645 in words is "five billion, one hundred seventy-eight million, eight hundred fifty-seven thousand, six hundred forty-five".