77739776064 has 84 divisors (see below), whose sum is σ = 225511833456. Its totient is φ = 25601035008.

The previous prime is 77739776063. The next prime is 77739776069. The reversal of 77739776064 is 46067793777.

It is a junction number, because it is equal to n+sod(n) for n = 77739775992 and 77739776010.

It is not an unprimeable number, because it can be changed into a prime (77739776063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 765234 + ... + 860849.

It is an arithmetic number, because the mean of its divisors is an integer number (2684664684).

Almost surely, 2^77739776064 is an apocalyptic number.

It is an amenable number.

77739776064 is an abundant number, since it is smaller than the sum of its proper divisors (147772057392).

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

77739776064 is a wasteful number, since it uses less digits than its factorization.

77739776064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626184 (or 1626171 counting only the distinct ones).

The product of its (nonzero) digits is 65345616, while the sum is 63.

The spelling of 77739776064 in words is "seventy-seven billion, seven hundred thirty-nine million, seven hundred seventy-six thousand, sixty-four".