128277626380825 has 24 divisors (see below), whose sum is σ = 164990382183000. Its totient is φ = 98817768591360.

The previous prime is 128277626380807. The next prime is 128277626380831. The reversal of 128277626380825 is 528083626772821.

It can be written as a sum of positive squares in 12 ways, for example, as 27740667497481 + 100536958883344 = 5266941^2 + 10026812^2 .

It is not a de Polignac number, because 128277626380825 - 2⁷ = 128277626380697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236907400 + ... + 237448249.

It is an arithmetic number, because the mean of its divisors is an integer number (6874599257625).

Almost surely, 2^{128277626380825} is an apocalyptic number.

It is an amenable number.

128277626380825 is a deficient number, since it is larger than the sum of its proper divisors (36712755802175).

128277626380825 is a wasteful number, since it uses less digits than its factorization.

128277626380825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474356061 (or 474356056 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 67.

The spelling of 128277626380825 in words is "one hundred twenty-eight trillion, two hundred seventy-seven billion, six hundred twenty-six million, three hundred eighty thousand, eight hundred twenty-five".