5489785781 has 2 divisors, whose sum is σ = 5489785782. Its totient is φ = 5489785780.

The previous prime is 5489785757. The next prime is 5489785783. The reversal of 5489785781 is 1875879845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3660855025 + 1828930756 = 60505^2 + 42766^2 .

It is a cyclic number.

It is not a de Polignac number, because 5489785781 - 2²² = 5485591477 is a prime.

It is a super-2 number, since 2×5489785781² = 60275495842539559922, which contains 22 as substring.

Together with 5489785783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5489785783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2744892890 + 2744892891.

It is an arithmetic number, because the mean of its divisors is an integer number (2744892891).

Almost surely, 2^5489785781 is an apocalyptic number.

It is an amenable number.

5489785781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5489785781 is an equidigital number, since it uses as much as digits as its factorization.

5489785781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22579200, while the sum is 62.

The square root of 5489785781 is about 74093.0886183050. The cubic root of 5489785781 is about 1764.0807707945.

The spelling of 5489785781 in words is "five billion, four hundred eighty-nine million, seven hundred eighty-five thousand, seven hundred eighty-one".