128540193674 has 4 divisors (see below), whose sum is σ = 192810290514. Its totient is φ = 64270096836.

The previous prime is 128540193667. The next prime is 128540193701. The reversal of 128540193674 is 476391045821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 476391045821 = 31 ⋅15367453091.

It can be written as a sum of positive squares in only one way, i.e., 74607098449 + 53933095225 = 273143^2 + 232235^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32135048417 + ... + 32135048420.

It is a 1-persistent number, because it is pandigital, but 2⋅128540193674 = 257080387348 is not.

Almost surely, 2^128540193674 is an apocalyptic number.

128540193674 is a deficient number, since it is larger than the sum of its proper divisors (64270096840).

128540193674 is an equidigital number, since it uses as much as digits as its factorization.

128540193674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64270096839.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 128540193674 in words is "one hundred twenty-eight billion, five hundred forty million, one hundred ninety-three thousand, six hundred seventy-four".