776127522361 has 3 divisors (see below), whose sum is σ = 776128403343. Its totient is φ = 776126641380.

The previous prime is 776127522347. The next prime is 776127522367. The reversal of 776127522361 is 163225721677.

The square root of 776127522361 is 880981.

It is a perfect power (a square), and thus also a powerful number.

776127522361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 38624433961 + 737503088400 = 196531^2 + 858780^2 .

It is not a de Polignac number, because 776127522361 - 2¹⁵ = 776127489593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (776127522367) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 440491 + ... + 1321471.

It is an arithmetic number, because the mean of its divisors is an integer number (258709467781).

Almost surely, 2^776127522361 is an apocalyptic number.

776127522361 is the 880981-st square number.

776127522361 is the 440491-st centered octagonal number.

It is an amenable number.

776127522361 is a deficient number, since it is larger than the sum of its proper divisors (880982).

776127522361 is an frugal number, since it uses more digits than its factorization.

776127522361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761962 (or 880981 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 49.

Multiplying 776127522361 by its sum of digits (49), we get a square (38030248595689 = 6166867²).

The spelling of 776127522361 in words is "seven hundred seventy-six billion, one hundred twenty-seven million, five hundred twenty-two thousand, three hundred sixty-one".