2077804048681 has 3 divisors (see below), whose sum is σ = 2077805490141. Its totient is φ = 2077802607222.

The previous prime is 2077804048679. The next prime is 2077804048729. The reversal of 2077804048681 is 1868404087702.

The square root of 2077804048681 is 1441459.

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 is not a de Polignac number, because 2077804048681 - 2¹ = 2077804048679 is a prime.

It is a super-2 number, since 2×2077804048681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2077804048651) 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, 720730 + ... + 2162188.

It is an arithmetic number, because the mean of its divisors is an integer number (692601830047).

Almost surely, 2^{2077804048681} is an apocalyptic number.

2077804048681 is the 1441459-th square number.

2077804048681 is the 720730-th centered octagonal number.

It is an amenable number.

2077804048681 is a deficient number, since it is larger than the sum of its proper divisors (1441460).

2077804048681 is an frugal number, since it uses more digits than its factorization.

2077804048681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882918 (or 1441459 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 55.

The spelling of 2077804048681 in words is "two trillion, seventy-seven billion, eight hundred four million, forty-eight thousand, six hundred eighty-one".