77200128801 has 6 divisors (see below), whose sum is σ = 111511297170. Its totient is φ = 51466752528.

The previous prime is 77200128793. The next prime is 77200128829. The reversal of 77200128801 is 10882100277.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 52681266576 + 24518862225 = 229524^2 + 156585^2 .

It is not a de Polignac number, because 77200128801 - 2³ = 77200128793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77200128601) 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, 4288896036 + ... + 4288896053.

It is an arithmetic number, because the mean of its divisors is an integer number (18585216195).

Almost surely, 2^77200128801 is an apocalyptic number.

It is an amenable number.

77200128801 is a deficient number, since it is larger than the sum of its proper divisors (34311168369).

77200128801 is a wasteful number, since it uses less digits than its factorization.

77200128801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8577792095 (or 8577792092 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The spelling of 77200128801 in words is "seventy-seven billion, two hundred million, one hundred twenty-eight thousand, eight hundred one".