3905864125 has 16 divisors (see below), whose sum is σ = 4878534960. Its totient is φ = 3122116800.

The previous prime is 3905864119. The next prime is 3905864233. The reversal of 3905864125 is 5214685093.

It can be written as a sum of positive squares in 8 ways, for example, as 1709160964 + 2196703161 = 41342^2 + 46869^2 .

It is not a de Polignac number, because 3905864125 - 2¹⁵ = 3905831357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147391 + ... + 171859.

It is an arithmetic number, because the mean of its divisors is an integer number (304908435).

Almost surely, 2^3905864125 is an apocalyptic number.

It is an amenable number.

3905864125 is a deficient number, since it is larger than the sum of its proper divisors (972670835).

3905864125 is a wasteful number, since it uses less digits than its factorization.

3905864125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25761 (or 25751 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 3905864125 is about 62496.9129237597. The cubic root of 3905864125 is about 1574.8494523105.

The spelling of 3905864125 in words is "three billion, nine hundred five million, eight hundred sixty-four thousand, one hundred twenty-five".