77609716 has 12 divisors (see below), whose sum is σ = 136033380. Its totient is φ = 38743040.

The previous prime is 77609689. The next prime is 77609717. The reversal of 77609716 is 61790677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67305616 + 10304100 = 8204^2 + 3210^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77609717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12571 + ... + 17698.

It is an arithmetic number, because the mean of its divisors is an integer number (11336115).

Almost surely, 2^77609716 is an apocalyptic number.

It is an amenable number.

77609716 is a deficient number, since it is larger than the sum of its proper divisors (58423664).

77609716 is a wasteful number, since it uses less digits than its factorization.

77609716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30914 (or 30912 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 77609716 is about 8809.6376769990. The cubic root of 77609716 is about 426.5520479336.

The spelling of 77609716 in words is "seventy-seven million, six hundred nine thousand, seven hundred sixteen".