128194073764 has 9 divisors (see below), whose sum is σ = 224340882241. Its totient is φ = 64096678840.

The previous prime is 128194073759. The next prime is 128194073767. The reversal of 128194073764 is 467370491821.

It is a happy number.

The square root of 128194073764 is 358042.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 30575320164 + 97618753600 = 174858^2 + 312440^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128194073767) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 626574 + ... + 805594.

Almost surely, 2^128194073764 is an apocalyptic number.

128194073764 is the 358042-nd square number.

It is an amenable number.

128194073764 is a deficient number, since it is larger than the sum of its proper divisors (96146808477).

128194073764 is an frugal number, since it uses more digits than its factorization.

128194073764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358046 (or 179023 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 128194073764 in words is "one hundred twenty-eight billion, one hundred ninety-four million, seventy-three thousand, seven hundred sixty-four".