77161161 has 16 divisors (see below), whose sum is σ = 128268288. Its totient is φ = 40083600.

The previous prime is 77161129. The next prime is 77161177. The reversal of 77161161 is 16116177.

It is not a de Polignac number, because 77161161 - 2⁵ = 77161129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77161121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166785 + ... + 167246.

It is an arithmetic number, because the mean of its divisors is an integer number (8016768).

Almost surely, 2^77161161 is an apocalyptic number.

It is an amenable number.

77161161 is a deficient number, since it is larger than the sum of its proper divisors (51107127).

77161161 is a wasteful number, since it uses less digits than its factorization.

77161161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334052.

The product of its digits is 1764, while the sum is 30.

The square root of 77161161 is about 8784.1425876405. The cubic root of 77161161 is about 425.7286894633.

The spelling of 77161161 in words is "seventy-seven million, one hundred sixty-one thousand, one hundred sixty-one".