128340011772 has 36 divisors (see below), whose sum is σ = 370760034736. Its totient is φ = 36668574720.

The previous prime is 128340011731. The next prime is 128340011843. The reversal of 128340011772 is 277110043821.

128340011772 is a `hidden beast` number, since 1 + 2 + 83 + 400 + 1 + 177 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254642629 + ... + 254643132.

Almost surely, 2^128340011772 is an apocalyptic number.

128340011772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128340011772 is an abundant number, since it is smaller than the sum of its proper divisors (242420022964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128340011772 is a wasteful number, since it uses less digits than its factorization.

128340011772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509285778 (or 509285773 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 128340011772 in words is "one hundred twenty-eight billion, three hundred forty million, eleven thousand, seven hundred seventy-two".