77321016 has 96 divisors (see below), whose sum is σ = 217488960. Its totient is φ = 24800256.

The previous prime is 77320993. The next prime is 77321021. The reversal of 77321016 is 61012377.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246876 + ... + 247188.

It is an arithmetic number, because the mean of its divisors is an integer number (2265510).

Almost surely, 2^77321016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77321016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108744480).

77321016 is an abundant number, since it is smaller than the sum of its proper divisors (140167944).

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

77321016 is a wasteful number, since it uses less digits than its factorization.

77321016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 77321016 is about 8793.2369466539. The cubic root of 77321016 is about 426.0224811253.

The spelling of 77321016 in words is "seventy-seven million, three hundred twenty-one thousand, sixteen".