3921699333406 has 32 divisors (see below), whose sum is σ = 6340994496000. Its totient is φ = 1813524178752.

The previous prime is 3921699333361. The next prime is 3921699333407. The reversal of 3921699333406 is 6043339961293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921699333407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7071936 + ... + 7606291.

It is an arithmetic number, because the mean of its divisors is an integer number (198156078000).

Almost surely, 2^{3921699333406} is an apocalyptic number.

3921699333406 is a deficient number, since it is larger than the sum of its proper divisors (2419295162594).

3921699333406 is a wasteful number, since it uses less digits than its factorization.

3921699333406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14678416.

The product of its (nonzero) digits is 17006112, while the sum is 58.

The spelling of 3921699333406 in words is "three trillion, nine hundred twenty-one billion, six hundred ninety-nine million, three hundred thirty-three thousand, four hundred six".