8488981777 has 2 divisors, whose sum is σ = 8488981778. Its totient is φ = 8488981776.

The previous prime is 8488981769. The next prime is 8488981799. The reversal of 8488981777 is 7771898848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7298455761 + 1190526016 = 85431^2 + 34504^2 .

It is a cyclic number.

It is not a de Polignac number, because 8488981777 - 2³ = 8488981769 is a prime.

It is a super-2 number, since 2×8488981777² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8488981727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4244490888 + 4244490889.

It is an arithmetic number, because the mean of its divisors is an integer number (4244490889).

Almost surely, 2^8488981777 is an apocalyptic number.

It is an amenable number.

8488981777 is a deficient number, since it is larger than the sum of its proper divisors (1).

8488981777 is an equidigital number, since it uses as much as digits as its factorization.

8488981777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50577408, while the sum is 67.

The square root of 8488981777 is about 92135.6704919436. The cubic root of 8488981777 is about 2039.9453542488.

The spelling of 8488981777 in words is "eight billion, four hundred eighty-eight million, nine hundred eighty-one thousand, seven hundred seventy-seven".