77720350616 has 32 divisors (see below), whose sum is σ = 147381659040. Its totient is φ = 38419411968.

The previous prime is 77720350579. The next prime is 77720350651. The reversal of 77720350616 is 61605302777.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698606 + ... + 802178.

It is an arithmetic number, because the mean of its divisors is an integer number (4605676845).

Almost surely, 2^77720350616 is an apocalyptic number.

It is an amenable number.

77720350616 is a deficient number, since it is larger than the sum of its proper divisors (69661308424).

77720350616 is a wasteful number, since it uses less digits than its factorization.

77720350616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104643 (or 104639 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 44.

The spelling of 77720350616 in words is "seventy-seven billion, seven hundred twenty million, three hundred fifty thousand, six hundred sixteen".