2774620161 has 6 divisors (see below), whose sum is σ = 4007784690. Its totient is φ = 1849746768.

The previous prime is 2774620127. The next prime is 2774620171. The reversal of 2774620161 is 1610264772.

2774620161 is a `hidden beast` number, since 27 + 7 + 4 + 620 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2647719936 + 126900225 = 51456^2 + 11265^2 .

It is not a de Polignac number, because 2774620161 - 2²¹ = 2772523009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2774620171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154145556 + ... + 154145573.

It is an arithmetic number, because the mean of its divisors is an integer number (667964115).

Almost surely, 2^2774620161 is an apocalyptic number.

It is an amenable number.

2774620161 is a deficient number, since it is larger than the sum of its proper divisors (1233164529).

2774620161 is a wasteful number, since it uses less digits than its factorization.

2774620161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308291135 (or 308291132 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 2774620161 is about 52674.6633686443. The cubic root of 2774620161 is about 1405.1882594541.

The spelling of 2774620161 in words is "two billion, seven hundred seventy-four million, six hundred twenty thousand, one hundred sixty-one".