3125660385 has 16 divisors (see below), whose sum is σ = 5001765120. Its totient is φ = 1666782720.

The previous prime is 3125660381. The next prime is 3125660387. The reversal of 3125660385 is 5830665213.

It is not a de Polignac number, because 3125660385 - 2² = 3125660381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3125660381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166296 + ... + 184134.

It is an arithmetic number, because the mean of its divisors is an integer number (312610320).

Almost surely, 2^3125660385 is an apocalyptic number.

It is an amenable number.

3125660385 is a deficient number, since it is larger than the sum of its proper divisors (1876104735).

3125660385 is a wasteful number, since it uses less digits than its factorization.

3125660385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29528.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 3125660385 is about 55907.6057884793. The cubic root of 3125660385 is about 1462.1118473171. Note that the first 3 decimals are identical.

The spelling of 3125660385 in words is "three billion, one hundred twenty-five million, six hundred sixty thousand, three hundred eighty-five".