5178466838894 has 4 divisors (see below), whose sum is σ = 7767700258344. Its totient is φ = 2589233419446.

The previous prime is 5178466838893. The next prime is 5178466838983. The reversal of 5178466838894 is 4988386648715.

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

It is a super-2 number, since 2×5178466838894² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5178466838891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1294616709722 + ... + 1294616709725.

It is an arithmetic number, because the mean of its divisors is an integer number (1941925064586).

Almost surely, 2^{5178466838894} is an apocalyptic number.

5178466838894 is a deficient number, since it is larger than the sum of its proper divisors (2589233419450).

5178466838894 is a wasteful number, since it uses less digits than its factorization.

5178466838894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589233419449.

The product of its digits is 2229534720, while the sum is 77.

The spelling of 5178466838894 in words is "five trillion, one hundred seventy-eight billion, four hundred sixty-six million, eight hundred thirty-eight thousand, eight hundred ninety-four".