771084129889 has 2 divisors, whose sum is σ = 771084129890. Its totient is φ = 771084129888.

The previous prime is 771084129791. The next prime is 771084129961. The reversal of 771084129889 is 988921480177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496263891600 + 274820238289 = 704460^2 + 524233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-771084129889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 771084129889.

It is not a weakly prime, because it can be changed into another prime (771084129289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385542064944 + 385542064945.

It is an arithmetic number, because the mean of its divisors is an integer number (385542064945).

Almost surely, 2^771084129889 is an apocalyptic number.

It is an amenable number.

771084129889 is a deficient number, since it is larger than the sum of its proper divisors (1).

771084129889 is an equidigital number, since it uses as much as digits as its factorization.

771084129889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16257024, while the sum is 64.

The spelling of 771084129889 in words is "seven hundred seventy-one billion, eighty-four million, one hundred twenty-nine thousand, eight hundred eighty-nine".