5321978918 has 8 divisors (see below), whose sum is σ = 8152818912. Its totient is φ = 2604372616.

The previous prime is 5321978891. The next prime is 5321978923. The reversal of 5321978918 is 8198791235.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 5321978918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28308305 + ... + 28308492.

It is an arithmetic number, because the mean of its divisors is an integer number (1019102364).

Almost surely, 2^5321978918 is an apocalyptic number.

5321978918 is a deficient number, since it is larger than the sum of its proper divisors (2830839994).

5321978918 is a wasteful number, since it uses less digits than its factorization.

5321978918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56616846.

The product of its digits is 1088640, while the sum is 53.

The square root of 5321978918 is about 72951.8945470232. The cubic root of 5321978918 is about 1745.9201741244.

The spelling of 5321978918 in words is "five billion, three hundred twenty-one million, nine hundred seventy-eight thousand, nine hundred eighteen".