5181997392 has 480 divisors, whose sum is σ = 18338576256. Its totient is φ = 1341849600.

The previous prime is 5181997367. The next prime is 5181997427. The reversal of 5181997392 is 2937991815.

5181997392 is a `hidden beast` number, since 518 + 1 + 9 + 97 + 39 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39557167 + ... + 39557297.

Almost surely, 2^5181997392 is an apocalyptic number.

5181997392 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5181997392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9169288128).

5181997392 is an abundant number, since it is smaller than the sum of its proper divisors (13156578864).

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

5181997392 is a wasteful number, since it uses less digits than its factorization.

5181997392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 290 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 5181997392 is about 71986.0916566527. The cubic root of 5181997392 is about 1730.4765960568.

The spelling of 5181997392 in words is "five billion, one hundred eighty-one million, nine hundred ninety-seven thousand, three hundred ninety-two".