78769616 has 10 divisors (see below), whose sum is σ = 152616162. Its totient is φ = 39384800.

The previous prime is 78769609. The next prime is 78769637. The reversal of 78769616 is 61696787.

It can be written as a sum of positive squares in only one way, i.e., 72318016 + 6451600 = 8504^2 + 2540^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2461535 + ... + 2461566.

Almost surely, 2^78769616 is an apocalyptic number.

It is an amenable number.

78769616 is a deficient number, since it is larger than the sum of its proper divisors (73846546).

78769616 is a wasteful number, since it uses less digits than its factorization.

78769616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923109 (or 4923103 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 78769616 is about 8875.2248422223. The cubic root of 78769616 is about 428.6665306832. Note that the first 3 decimals are identical.

The spelling of 78769616 in words is "seventy-eight million, seven hundred sixty-nine thousand, six hundred sixteen".