3125512643 has 12 divisors (see below), whose sum is σ = 3508582560. Its totient is φ = 2780915280.

The previous prime is 3125512639. The next prime is 3125512651. The reversal of 3125512643 is 3462155213.

It is a happy number.

3125512643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3125512643 - 2² = 3125512639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3125512633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269108 + ... + 280481.

It is an arithmetic number, because the mean of its divisors is an integer number (292381880).

Almost surely, 2^3125512643 is an apocalyptic number.

3125512643 is a deficient number, since it is larger than the sum of its proper divisors (383069917).

3125512643 is a wasteful number, since it uses less digits than its factorization.

3125512643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549658 (or 549647 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 3125512643 is about 55906.2844678485. The cubic root of 3125512643 is about 1462.0888101873.

Adding to 3125512643 its reverse (3462155213), we get a palindrome (6587667856).

The spelling of 3125512643 in words is "three billion, one hundred twenty-five million, five hundred twelve thousand, six hundred forty-three".