777061601321 has 8 divisors (see below), whose sum is σ = 784775872200. Its totient is φ = 769347734400.

The previous prime is 777061601317. The next prime is 777061601363. The reversal of 777061601321 is 123106160777.

It can be written as a sum of positive squares in 4 ways, for example, as 214981522921 + 562080078400 = 463661^2 + 749720^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 777061601321 - 2² = 777061601317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (777061601021) 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 7 ways as a sum of consecutive naturals, for example, 5074445 + ... + 5225333.

It is an arithmetic number, because the mean of its divisors is an integer number (98096984025).

Almost surely, 2^777061601321 is an apocalyptic number.

It is an amenable number.

777061601321 is a deficient number, since it is larger than the sum of its proper divisors (7714270879).

777061601321 is a wasteful number, since it uses less digits than its factorization.

777061601321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201979.

The product of its (nonzero) digits is 74088, while the sum is 41.

The spelling of 777061601321 in words is "seven hundred seventy-seven billion, sixty-one million, six hundred one thousand, three hundred twenty-one".