3878618525 has 24 divisors (see below), whose sum is σ = 4861590624. Its totient is φ = 3069435200.

The previous prime is 3878618521. The next prime is 3878618539. The reversal of 3878618525 is 5258168783.

It is not a de Polignac number, because 3878618525 - 2² = 3878618521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878618521) 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, 1134719 + ... + 1138131.

It is an arithmetic number, because the mean of its divisors is an integer number (202566276).

Almost surely, 2^3878618525 is an apocalyptic number.

It is an amenable number.

3878618525 is a deficient number, since it is larger than the sum of its proper divisors (982972099).

3878618525 is a wasteful number, since it uses less digits than its factorization.

3878618525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901 (or 3896 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 53.

The square root of 3878618525 is about 62278.5559000849. Note that the first 3 decimals coincide. The cubic root of 3878618525 is about 1571.1790843889.

The spelling of 3878618525 in words is "three billion, eight hundred seventy-eight million, six hundred eighteen thousand, five hundred twenty-five".