3868355521 has 8 divisors (see below), whose sum is σ = 4075104320. Its totient is φ = 3661921872.

The previous prime is 3868355489. The next prime is 3868355537. The reversal of 3868355521 is 1255538683.

It is a happy number.

3868355521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3868355521 - 2⁵ = 3868355489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3868355581) 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, 53370 + ... + 102883.

It is an arithmetic number, because the mean of its divisors is an integer number (509388040).

Almost surely, 2^3868355521 is an apocalyptic number.

It is an amenable number.

3868355521 is a deficient number, since it is larger than the sum of its proper divisors (206748799).

3868355521 is a wasteful number, since it uses less digits than its factorization.

3868355521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157575.

The product of its digits is 864000, while the sum is 46.

The square root of 3868355521 is about 62196.1053523450. The cubic root of 3868355521 is about 1569.7920561139.

The spelling of 3868355521 in words is "three billion, eight hundred sixty-eight million, three hundred fifty-five thousand, five hundred twenty-one".