5218379637994 has 4 divisors (see below), whose sum is σ = 7827569456994. Its totient is φ = 2609189818996.

The previous prime is 5218379637983. The next prime is 5218379637997. The reversal of 5218379637994 is 4997369738125.

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

It can be written as a sum of positive squares in only one way, i.e., 4437498132369 + 780881505625 = 2106537^2 + 883675^2 .

It is not an unprimeable number, because it can be changed into a prime (5218379637997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304594909497 + ... + 1304594909500.

Almost surely, 2^{5218379637994} is an apocalyptic number.

5218379637994 is a deficient number, since it is larger than the sum of its proper divisors (2609189819000).

5218379637994 is a wasteful number, since it uses less digits than its factorization.

5218379637994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609189818999.

The product of its digits is 617258880, while the sum is 73.

The spelling of 5218379637994 in words is "five trillion, two hundred eighteen billion, three hundred seventy-nine million, six hundred thirty-seven thousand, nine hundred ninety-four".