5681249280 has 880 divisors, whose sum is σ = 24729070080. Its totient is φ = 1218281472.

The previous prime is 5681249237. The next prime is 5681249281. The reversal of 5681249280 is 829421865.

5681249280 is a `hidden beast` number, since 5 + 6 + 81 + 2 + 492 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681249281) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 55157709 + ... + 55157811.

It is an arithmetic number, because the mean of its divisors is an integer number (28101216).

Almost surely, 2^5681249280 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 5681249280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12364535040).

5681249280 is an abundant number, since it is smaller than the sum of its proper divisors (19047820800).

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

5681249280 is a wasteful number, since it uses less digits than its factorization.

5681249280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 5681249280 is about 75374.0623822280. The cubic root of 5681249280 is about 1784.3550809096.

The spelling of 5681249280 in words is "five billion, six hundred eighty-one million, two hundred forty-nine thousand, two hundred eighty".