77645116 has 12 divisors (see below), whose sum is σ = 135957640. Its totient is φ = 38800080.

The previous prime is 77645107. The next prime is 77645119. The reversal of 77645116 is 61154677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77645119) 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 3 ways as a sum of consecutive naturals, for example, 3970 + ... + 13078.

Almost surely, 2^77645116 is an apocalyptic number.

It is an amenable number.

77645116 is a deficient number, since it is larger than the sum of its proper divisors (58312524).

77645116 is a wasteful number, since it uses less digits than its factorization.

77645116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11244 (or 11242 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 77645116 is about 8811.6466111618. The cubic root of 77645116 is about 426.6168922513.

It can be divided in two parts, 7764 and 5116, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 77645116 in words is "seventy-seven million, six hundred forty-five thousand, one hundred sixteen".