1256326319375 has 20 divisors (see below), whose sum is σ = 1569977065272. Its totient is φ = 1005015156000.

The previous prime is 1256326319371. The next prime is 1256326319377. The reversal of 1256326319375 is 5739136236521.

It is not a de Polignac number, because 1256326319375 - 2² = 1256326319371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256326319371) 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 19 ways as a sum of consecutive naturals, for example, 22514009 + ... + 22569741.

Almost surely, 2^{1256326319375} is an apocalyptic number.

1256326319375 is a deficient number, since it is larger than the sum of its proper divisors (313650745897).

1256326319375 is an frugal number, since it uses more digits than its factorization.

1256326319375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91820 (or 91805 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 53.

The spelling of 1256326319375 in words is "one trillion, two hundred fifty-six billion, three hundred twenty-six million, three hundred nineteen thousand, three hundred seventy-five".