128357472977 has 2 divisors, whose sum is σ = 128357472978. Its totient is φ = 128357472976.

The previous prime is 128357472941. The next prime is 128357473007. The reversal of 128357472977 is 779274753821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112503893056 + 15853579921 = 335416^2 + 125911^2 .

It is a cyclic number.

It is not a de Polignac number, because 128357472977 - 2¹⁰ = 128357471953 is a prime.

It is not a weakly prime, because it can be changed into another prime (128357472937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64178736488 + 64178736489.

It is an arithmetic number, because the mean of its divisors is an integer number (64178736489).

Almost surely, 2^128357472977 is an apocalyptic number.

It is an amenable number.

128357472977 is a deficient number, since it is larger than the sum of its proper divisors (1).

128357472977 is an equidigital number, since it uses as much as digits as its factorization.

128357472977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41489280, while the sum is 62.

The spelling of 128357472977 in words is "one hundred twenty-eight billion, three hundred fifty-seven million, four hundred seventy-two thousand, nine hundred seventy-seven".