1867771161 has 12 divisors (see below), whose sum is σ = 2730397488. Its totient is φ = 1230178104.

The previous prime is 1867771159. The next prime is 1867771183. The reversal of 1867771161 is 1611777681.

It is not a de Polignac number, because 1867771161 - 2¹ = 1867771159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1867771141) 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 11 ways as a sum of consecutive naturals, for example, 1249435 + ... + 1250928.

It is an arithmetic number, because the mean of its divisors is an integer number (227533124).

Almost surely, 2^1867771161 is an apocalyptic number.

It is an amenable number.

1867771161 is a deficient number, since it is larger than the sum of its proper divisors (862626327).

1867771161 is a wasteful number, since it uses less digits than its factorization.

1867771161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500452 (or 2500449 counting only the distinct ones).

The product of its digits is 98784, while the sum is 45.

The square root of 1867771161 is about 43217.7181373566. The cubic root of 1867771161 is about 1231.5192984742.

The spelling of 1867771161 in words is "one billion, eight hundred sixty-seven million, seven hundred seventy-one thousand, one hundred sixty-one".