3925752866449 has 4 divisors (see below), whose sum is σ = 3925769863680. Its totient is φ = 3925735869220.

The previous prime is 3925752866389. The next prime is 3925752866459. The reversal of 3925752866449 is 9446682575293.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3925752866449 - 2¹¹ = 3925752864401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3925752866459) 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, 8147329 + ... + 8615710.

It is an arithmetic number, because the mean of its divisors is an integer number (981442465920).

Almost surely, 2^{3925752866449} is an apocalyptic number.

It is an amenable number.

3925752866449 is a deficient number, since it is larger than the sum of its proper divisors (16997231).

3925752866449 is a wasteful number, since it uses less digits than its factorization.

3925752866449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16997230.

The product of its digits is 783820800, while the sum is 70.

The spelling of 3925752866449 in words is "three trillion, nine hundred twenty-five billion, seven hundred fifty-two million, eight hundred sixty-six thousand, four hundred forty-nine".