3904128722109 has 24 divisors (see below), whose sum is σ = 6539146734400. Its totient is φ = 2028118815360.

The previous prime is 3904128722071. The next prime is 3904128722113. The reversal of 3904128722109 is 9012278214093.

It is not a de Polignac number, because 3904128722109 - 2⁷ = 3904128721981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3904128762109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 768224284 + ... + 768229365.

Almost surely, 2^{3904128722109} is an apocalyptic number.

It is an amenable number.

3904128722109 is a deficient number, since it is larger than the sum of its proper divisors (2635018012291).

3904128722109 is a wasteful number, since it uses less digits than its factorization.

3904128722109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536453681 (or 1536453670 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 3904128722109 in words is "three trillion, nine hundred four billion, one hundred twenty-eight million, seven hundred twenty-two thousand, one hundred nine".