77221620116 has 48 divisors (see below), whose sum is σ = 137025036288. Its totient is φ = 38076729600.

The previous prime is 77221620083. The next prime is 77221620167. The reversal of 77221620116 is 61102612277.

It is a super-2 number, since 2×77221620116² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47873726 + ... + 47875338.

It is an arithmetic number, because the mean of its divisors is an integer number (2854688256).

Almost surely, 2^77221620116 is an apocalyptic number.

It is an amenable number.

77221620116 is a deficient number, since it is larger than the sum of its proper divisors (59803416172).

77221620116 is a wasteful number, since it uses less digits than its factorization.

77221620116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312 (or 2310 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The spelling of 77221620116 in words is "seventy-seven billion, two hundred twenty-one million, six hundred twenty thousand, one hundred sixteen".