3868258970521 has 9 divisors (see below), whose sum is σ = 4251911739733. Its totient is φ = 3516579396220.

The previous prime is 3868258970489. The next prime is 3868258970531. The reversal of 3868258970521 is 1250798528683.

The square root of 3868258970521 is 1966789.

It is a perfect power (a square), and thus also a powerful number.

3868258970521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3868258970521 - 2⁵ = 3868258970489 is a prime.

It is a super-2 number, since 2×3868258970521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3868258970531) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21545280 + ... + 21724078.

Almost surely, 2^{3868258970521} is an apocalyptic number.

3868258970521 is the 1966789-th square number.

3868258970521 is the 983395-th centered octagonal number.

It is an amenable number.

3868258970521 is a deficient number, since it is larger than the sum of its proper divisors (383652769212).

3868258970521 is an frugal number, since it uses more digits than its factorization.

3868258970521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357620 (or 178810 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 64.

Multiplying 3868258970521 by its sum of digits (64), we get a square (247568574113344 = 15734312²).

The spelling of 3868258970521 in words is "three trillion, eight hundred sixty-eight billion, two hundred fifty-eight million, nine hundred seventy thousand, five hundred twenty-one".