5477457781 has 2 divisors, whose sum is σ = 5477457782. Its totient is φ = 5477457780.

The previous prime is 5477457773. The next prime is 5477457823. The reversal of 5477457781 is 1877547745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3176336881 + 2301120900 = 56359^2 + 47970^2 .

It is a cyclic number.

It is not a de Polignac number, because 5477457781 - 2³ = 5477457773 is a prime.

It is a super-2 number, since 2×5477457781² = 60005087485274887922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5477457721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2738728890 + 2738728891.

It is an arithmetic number, because the mean of its divisors is an integer number (2738728891).

Almost surely, 2^5477457781 is an apocalyptic number.

It is an amenable number.

5477457781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5477457781 is an equidigital number, since it uses as much as digits as its factorization.

5477457781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7683200, while the sum is 55.

The square root of 5477457781 is about 74009.8492161685. The cubic root of 5477457781 is about 1762.7592931798.

The spelling of 5477457781 in words is "five billion, four hundred seventy-seven million, four hundred fifty-seven thousand, seven hundred eighty-one".