1256716616 has 16 divisors (see below), whose sum is σ = 2356752240. Its totient is φ = 628249360.

The previous prime is 1256716613. The next prime is 1256716651. The reversal of 1256716616 is 6166176521.

It is not an unprimeable number, because it can be changed into a prime (1256716613) 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 3 ways as a sum of consecutive naturals, for example, 56855 + ... + 75801.

It is an arithmetic number, because the mean of its divisors is an integer number (147297015).

Almost surely, 2^1256716616 is an apocalyptic number.

It is an amenable number.

1256716616 is a deficient number, since it is larger than the sum of its proper divisors (1100035624).

1256716616 is a wasteful number, since it uses less digits than its factorization.

1256716616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27244 (or 27240 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 1256716616 is about 35450.1990967611. The cubic root of 1256716616 is about 1079.1433009502.

The spelling of 1256716616 in words is "one billion, two hundred fifty-six million, seven hundred sixteen thousand, six hundred sixteen".