77213616 has 20 divisors (see below), whose sum is σ = 199468632. Its totient is φ = 25737856.

The previous prime is 77213603. The next prime is 77213623. The reversal of 77213616 is 61631277.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 804261 + ... + 804356.

Almost surely, 2^77213616 is an apocalyptic number.

It is an amenable number.

77213616 is an abundant number, since it is smaller than the sum of its proper divisors (122255016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77213616 is a wasteful number, since it uses less digits than its factorization.

77213616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608628 (or 1608622 counting only the distinct ones).

The product of its digits is 10584, while the sum is 33.

The square root of 77213616 is about 8787.1278584074. The cubic root of 77213616 is about 425.8251392817.

The spelling of 77213616 in words is "seventy-seven million, two hundred thirteen thousand, six hundred sixteen".