3908128529661 has 8 divisors (see below), whose sum is σ = 5210890204320. Its totient is φ = 2605392937392.

The previous prime is 3908128529639. The next prime is 3908128529677. The reversal of 3908128529661 is 1669258218093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3908128529661 - 2¹⁰ = 3908128528637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3908128529595 and 3908128529604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3908128529611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6168255 + ... + 6772268.

It is an arithmetic number, because the mean of its divisors is an integer number (651361275540).

Almost surely, 2^{3908128529661} is an apocalyptic number.

It is an amenable number.

3908128529661 is a deficient number, since it is larger than the sum of its proper divisors (1302761674659).

3908128529661 is a wasteful number, since it uses less digits than its factorization.

3908128529661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13041195.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 3908128529661 in words is "three trillion, nine hundred eight billion, one hundred twenty-eight million, five hundred twenty-nine thousand, six hundred sixty-one".