128372723201 has 2 divisors, whose sum is σ = 128372723202. Its totient is φ = 128372723200.

The previous prime is 128372723191. The next prime is 128372723221. The reversal of 128372723201 is 102327273821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124111767025 + 4260956176 = 352295^2 + 65276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128372723201 is a prime.

It is not a weakly prime, because it can be changed into another prime (128372723221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64186361600 + 64186361601.

It is an arithmetic number, because the mean of its divisors is an integer number (64186361601).

Almost surely, 2^128372723201 is an apocalyptic number.

It is an amenable number.

128372723201 is a deficient number, since it is larger than the sum of its proper divisors (1).

128372723201 is an equidigital number, since it uses as much as digits as its factorization.

128372723201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 128372723201 in words is "one hundred twenty-eight billion, three hundred seventy-two million, seven hundred twenty-three thousand, two hundred one".