777161320461 has 12 divisors (see below), whose sum is σ = 1138377146400. Its totient is φ = 510810257160.

The previous prime is 777161320457. The next prime is 777161320469. The reversal of 777161320461 is 164023161777.

777161320461 is a `hidden beast` number, since 7 + 7 + 7 + 1 + 613 + 20 + 4 + 6 + 1 = 666.

It is not a de Polignac number, because 777161320461 - 2² = 777161320457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777161320469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608106811 + ... + 608108088.

It is an arithmetic number, because the mean of its divisors is an integer number (94864762200).

Almost surely, 2^777161320461 is an apocalyptic number.

777161320461 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

777161320461 is a deficient number, since it is larger than the sum of its proper divisors (361215825939).

777161320461 is a wasteful number, since it uses less digits than its factorization.

777161320461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216214976 (or 1216214973 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 777161320461 in words is "seven hundred seventy-seven billion, one hundred sixty-one million, three hundred twenty thousand, four hundred sixty-one".