77780750328 has 24 divisors (see below), whose sum is σ = 210656199000. Its totient is φ = 25926916752.

The previous prime is 77780750323. The next prime is 77780750347. The reversal of 77780750328 is 82305708777.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77780750323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540144028 + ... + 540144171.

It is an arithmetic number, because the mean of its divisors is an integer number (8777341625).

Almost surely, 2^77780750328 is an apocalyptic number.

It is an amenable number.

77780750328 is an abundant number, since it is smaller than the sum of its proper divisors (132875448672).

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

77780750328 is a wasteful number, since it uses less digits than its factorization.

77780750328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080288211 (or 1080288204 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 54.

The spelling of 77780750328 in words is "seventy-seven billion, seven hundred eighty million, seven hundred fifty thousand, three hundred twenty-eight".