3906620081664 has 40 divisors (see below), whose sum is σ = 10407480065400. Its totient is φ = 1302206693376.

The previous prime is 3906620081659. The next prime is 3906620081669. The reversal of 3906620081664 is 4661800266093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3906620081659) and next prime (3906620081669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906620081669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271684689 + ... + 1271687760.

It is an arithmetic number, because the mean of its divisors is an integer number (260187001635).

Almost surely, 2^{3906620081664} is an apocalyptic number.

It is an amenable number.

3906620081664 is an abundant number, since it is smaller than the sum of its proper divisors (6500859983736).

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

3906620081664 is an equidigital number, since it uses as much as digits as its factorization.

3906620081664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543372470 (or 2543372454 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 3906620081664 in words is "three trillion, nine hundred six billion, six hundred twenty million, eighty-one thousand, six hundred sixty-four".