2777197961 has 8 divisors (see below), whose sum is σ = 2894621184. Its totient is φ = 2661514560.

The previous prime is 2777197939. The next prime is 2777197987. The reversal of 2777197961 is 1697917772.

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 2777197961 - 2¹⁰ = 2777196937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2777197897 and 2777197906.

It is not an unprimeable number, because it can be changed into a prime (2777197931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431696 + ... + 438081.

It is an arithmetic number, because the mean of its divisors is an integer number (361827648).

Almost surely, 2^2777197961 is an apocalyptic number.

It is an amenable number.

2777197961 is a deficient number, since it is larger than the sum of its proper divisors (117423223).

2777197961 is a wasteful number, since it uses less digits than its factorization.

2777197961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869911.

The product of its digits is 2333772, while the sum is 56.

The square root of 2777197961 is about 52699.1267574710. The cubic root of 2777197961 is about 1405.6232947482.

The spelling of 2777197961 in words is "two billion, seven hundred seventy-seven million, one hundred ninety-seven thousand, nine hundred sixty-one".