3977771161 has 8 divisors (see below), whose sum is σ = 4895718464. Its totient is φ = 3147247440.

The previous prime is 3977771141. The next prime is 3977771221. The reversal of 3977771161 is 1611777793.

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 3977771161 - 2⁷ = 3977771033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3977771101) 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, 21855795 + ... + 21855976.

It is an arithmetic number, because the mean of its divisors is an integer number (611964808).

Almost surely, 2^3977771161 is an apocalyptic number.

It is an amenable number.

3977771161 is a deficient number, since it is larger than the sum of its proper divisors (917947303).

3977771161 is a wasteful number, since it uses less digits than its factorization.

3977771161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43711791.

The product of its digits is 388962, while the sum is 49.

The square root of 3977771161 is about 63069.5739719241. The cubic root of 3977771161 is about 1584.4550812167.

The spelling of 3977771161 in words is "three billion, nine hundred seventy-seven million, seven hundred seventy-one thousand, one hundred sixty-one".