5391344640 has 352 divisors, whose sum is σ = 19928674944. Its totient is φ = 1229455360.

The previous prime is 5391344627. The next prime is 5391344641. The reversal of 5391344640 is 464431935.

It is a tau number, because it is divible by the number of its divisors (352).

It is not an unprimeable number, because it can be changed into a prime (5391344641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2871382 + ... + 2873258.

Almost surely, 2^5391344640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5391344640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9964337472).

5391344640 is an abundant number, since it is smaller than the sum of its proper divisors (14537330304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5391344640 is a wasteful number, since it uses less digits than its factorization.

5391344640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933 (or 1915 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 5391344640 is about 73425.7764003895. The cubic root of 5391344640 is about 1753.4727925556.

The spelling of 5391344640 in words is "five billion, three hundred ninety-one million, three hundred forty-four thousand, six hundred forty".