771085487377 has 2 divisors, whose sum is σ = 771085487378. Its totient is φ = 771085487376.

The previous prime is 771085487371. The next prime is 771085487401. The reversal of 771085487377 is 773784580177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537294864016 + 233790623361 = 733004^2 + 483519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-771085487377 is a prime.

It is not a weakly prime, because it can be changed into another prime (771085487371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385542743688 + 385542743689.

It is an arithmetic number, because the mean of its divisors is an integer number (385542743689).

Almost surely, 2^771085487377 is an apocalyptic number.

It is an amenable number.

771085487377 is a deficient number, since it is larger than the sum of its proper divisors (1).

771085487377 is an equidigital number, since it uses as much as digits as its factorization.

771085487377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64538880, while the sum is 64.

The spelling of 771085487377 in words is "seven hundred seventy-one billion, eighty-five million, four hundred eighty-seven thousand, three hundred seventy-seven".