3925580644 has 12 divisors (see below), whose sum is σ = 6884801644. Its totient is φ = 1958494464.

The previous prime is 3925580579. The next prime is 3925580647. The reversal of 3925580644 is 4460855293.

It can be written as a sum of positive squares in 2 ways, for example, as 2829176100 + 1096404544 = 53190^2 + 33112^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3925580594 and 3925580603.

It is not an unprimeable number, because it can be changed into a prime (3925580647) 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, 1071909 + ... + 1075564.

Almost surely, 2^3925580644 is an apocalyptic number.

It is an amenable number.

3925580644 is a deficient number, since it is larger than the sum of its proper divisors (2959221000).

3925580644 is a wasteful number, since it uses less digits than its factorization.

3925580644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147934 (or 2147932 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 3925580644 is about 62654.4543029464. The cubic root of 3925580644 is about 1577.4949145533.

The spelling of 3925580644 in words is "three billion, nine hundred twenty-five million, five hundred eighty thousand, six hundred forty-four".