5681257187 has 2 divisors, whose sum is σ = 5681257188. Its totient is φ = 5681257186.

The previous prime is 5681257177. The next prime is 5681257229. The reversal of 5681257187 is 7817521865.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5681257187 is a prime.

It is not a weakly prime, because it can be changed into another prime (5681257177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840628593 + 2840628594.

It is an arithmetic number, because the mean of its divisors is an integer number (2840628594).

Almost surely, 2^5681257187 is an apocalyptic number.

5681257187 is a deficient number, since it is larger than the sum of its proper divisors (1).

5681257187 is an equidigital number, since it uses as much as digits as its factorization.

5681257187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 940800, while the sum is 50.

The square root of 5681257187 is about 75374.1148339402. The cubic root of 5681257187 is about 1784.3559087139.

The spelling of 5681257187 in words is "five billion, six hundred eighty-one million, two hundred fifty-seven thousand, one hundred eighty-seven".