877784477461 has 2 divisors, whose sum is σ = 877784477462. Its totient is φ = 877784477460.

The previous prime is 877784477411. The next prime is 877784477467. The reversal of 877784477461 is 164774487778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 876798140625 + 986336836 = 936375^2 + 31406^2 .

It is a cyclic number.

It is not a de Polignac number, because 877784477461 - 2⁷ = 877784477333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (877784477467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438892238730 + 438892238731.

It is an arithmetic number, because the mean of its divisors is an integer number (438892238731).

Almost surely, 2^877784477461 is an apocalyptic number.

It is an amenable number.

877784477461 is a deficient number, since it is larger than the sum of its proper divisors (1).

877784477461 is an equidigital number, since it uses as much as digits as its factorization.

877784477461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 413048832, while the sum is 70.

The spelling of 877784477461 in words is "eight hundred seventy-seven billion, seven hundred eighty-four million, four hundred seventy-seven thousand, four hundred sixty-one".