6377779321 has 3 divisors (see below), whose sum is σ = 6377859183.
Its totient is φ = 6377699460.
The previous prime is 6377779297. The next prime is 6377779337. The reversal of 6377779321 is 1239777736.
The square root of 6377779321 is 79861.
It is a perfect power (a square), and thus also a powerful number.
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., 6093519721 + 284259600 = 78061^2 + 16860^2
It is not a de Polignac number, because 6377779321 - 215 = 6377746553 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (6377729321) 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, 39931 + ... + 119791.
It is an arithmetic number, because the mean of its divisors is an integer number (2125953061).
Almost surely, 26377779321 is an apocalyptic number.
6377779321 is the 79861-st square number.
6377779321 is the 39931-st centered octagonal number.
It is an amenable number.
6377779321 is a deficient number, since it is larger than the sum of its proper divisors (79862).
6377779321 is an frugal number, since it uses more digits than its factorization.
6377779321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 159722 (or 79861 counting only the distinct ones).
The product of its digits is 2333772, while the sum is 52.
The cubic root of 6377779321 is about 1854.4843073587.
The spelling of 6377779321 in words is "six billion, three hundred seventy-seven million, seven hundred seventy-nine thousand, three hundred twenty-one".