77749301688 has 32 divisors (see below), whose sum is σ = 194441602560. Its totient is φ = 25907320800.

The previous prime is 77749301653. The next prime is 77749301701. The reversal of 77749301688 is 88610394777.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499720 + ... + 636567.

It is an arithmetic number, because the mean of its divisors is an integer number (6076300080).

Almost surely, 2^77749301688 is an apocalyptic number.

It is an amenable number.

77749301688 is an abundant number, since it is smaller than the sum of its proper divisors (116692300872).

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

77749301688 is a wasteful number, since it uses less digits than its factorization.

77749301688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139147 (or 1139143 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 60.

The spelling of 77749301688 in words is "seventy-seven billion, seven hundred forty-nine million, three hundred one thousand, six hundred eighty-eight".