5248728781 has 4 divisors (see below), whose sum is σ = 5261256000. Its totient is φ = 5236201564.

The previous prime is 5248728769. The next prime is 5248728787. The reversal of 5248728781 is 1878278425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5248728781 - 2¹⁷ = 5248597709 is a prime.

It is a super-2 number, since 2×5248728781² = 55098307632995491922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5248728787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6262981 + ... + 6263818.

It is an arithmetic number, because the mean of its divisors is an integer number (1315314000).

Almost surely, 2^5248728781 is an apocalyptic number.

It is an amenable number.

5248728781 is a deficient number, since it is larger than the sum of its proper divisors (12527219).

5248728781 is a wasteful number, since it uses less digits than its factorization.

5248728781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12527218.

The product of its digits is 2007040, while the sum is 52.

The square root of 5248728781 is about 72448.1109553589. The cubic root of 5248728781 is about 1737.8730320364.

The spelling of 5248728781 in words is "five billion, two hundred forty-eight million, seven hundred twenty-eight thousand, seven hundred eighty-one".