128754190777 has 2 divisors, whose sum is σ = 128754190778. Its totient is φ = 128754190776.

The previous prime is 128754190769. The next prime is 128754190811. The reversal of 128754190777 is 777091457821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76819882896 + 51934307881 = 277164^2 + 227891^2 .

It is a cyclic number.

It is not a de Polignac number, because 128754190777 - 2³ = 128754190769 is a prime.

It is a super-2 number, since 2×128754190777² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128754190717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64377095388 + 64377095389.

It is an arithmetic number, because the mean of its divisors is an integer number (64377095389).

Almost surely, 2^128754190777 is an apocalyptic number.

It is an amenable number.

128754190777 is a deficient number, since it is larger than the sum of its proper divisors (1).

128754190777 is an equidigital number, since it uses as much as digits as its factorization.

128754190777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6914880, while the sum is 58.

The spelling of 128754190777 in words is "one hundred twenty-eight billion, seven hundred fifty-four million, one hundred ninety thousand, seven hundred seventy-seven".