1256213724607 has 2 divisors, whose sum is σ = 1256213724608. Its totient is φ = 1256213724606.

The previous prime is 1256213724593. The next prime is 1256213724611. The reversal of 1256213724607 is 7064273126521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256213724607 - 2²³ = 1256205335999 is a prime.

It is a super-3 number, since 3×1256213724607³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256213724107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628106862303 + 628106862304.

It is an arithmetic number, because the mean of its divisors is an integer number (628106862304).

Almost surely, 2^{1256213724607} is an apocalyptic number.

1256213724607 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256213724607 is an equidigital number, since it uses as much as digits as its factorization.

1256213724607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 1256213724607 in words is "one trillion, two hundred fifty-six billion, two hundred thirteen million, seven hundred twenty-four thousand, six hundred seven".