77716161 has 12 divisors (see below), whose sum is σ = 112378240. Its totient is φ = 51754680.

The previous prime is 77716147. The next prime is 77716183. The reversal of 77716161 is 16161777.

It is not a de Polignac number, because 77716161 - 2⁶ = 77716097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77716141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5196 + ... + 13506.

Almost surely, 2^77716161 is an apocalyptic number.

It is an amenable number.

77716161 is a deficient number, since it is larger than the sum of its proper divisors (34662079).

77716161 is a wasteful number, since it uses less digits than its factorization.

77716161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9356 (or 9353 counting only the distinct ones).

The product of its digits is 12348, while the sum is 36.

The square root of 77716161 is about 8815.6770017963. The cubic root of 77716161 is about 426.7469702230.

It can be divided in two parts, 77716 and 161, that added together give a palindrome (77877).

The spelling of 77716161 in words is "seventy-seven million, seven hundred sixteen thousand, one hundred sixty-one".