3914686521 has 24 divisors (see below), whose sum is σ = 5809745760. Its totient is φ = 2539074816.

The previous prime is 3914686511. The next prime is 3914686591. The reversal of 3914686521 is 1256864193.

3914686521 is a `hidden beast` number, since 3 + 9 + 1 + 46 + 86 + 521 = 666.

It is not a de Polignac number, because 3914686521 - 2¹⁹ = 3914162233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3914686511) 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, 13506 + ... + 89508.

It is an arithmetic number, because the mean of its divisors is an integer number (242072740).

Almost surely, 2^3914686521 is an apocalyptic number.

It is an amenable number.

3914686521 is a deficient number, since it is larger than the sum of its proper divisors (1895059239).

3914686521 is a wasteful number, since it uses less digits than its factorization.

3914686521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76165 (or 76162 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3914686521 is about 62567.4557657573. The cubic root of 3914686521 is about 1576.0342944827.

The spelling of 3914686521 in words is "three billion, nine hundred fourteen million, six hundred eighty-six thousand, five hundred twenty-one".