1256896500064 has 12 divisors (see below), whose sum is σ = 2474514984564. Its totient is φ = 628448250016.

The previous prime is 1256896500019. The next prime is 1256896500073. The reversal of 1256896500064 is 4600056986521.

It is a hoax number, since the sum of its digits (52) 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 = 1256896499984 and 1256896500020.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19639007782 + ... + 19639007845.

It is an arithmetic number, because the mean of its divisors is an integer number (206209582047).

Almost surely, 2^{1256896500064} is an apocalyptic number.

It is an amenable number.

1256896500064 is a deficient number, since it is larger than the sum of its proper divisors (1217618484500).

1256896500064 is an equidigital number, since it uses as much as digits as its factorization.

1256896500064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39278015637 (or 39278015629 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 1256896500064 in words is "one trillion, two hundred fifty-six billion, eight hundred ninety-six million, five hundred thousand, sixty-four".