1256700693623 has 2 divisors, whose sum is σ = 1256700693624. Its totient is φ = 1256700693622.

The previous prime is 1256700693601. The next prime is 1256700693641. The reversal of 1256700693623 is 3263960076521.

It is a strong prime.

It is an emirp because it is prime and its reverse (3263960076521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1256700693623 - 2³⁴ = 1239520824439 is a prime.

It is a super-2 number, since 2×1256700693623² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256700693653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628350346811 + 628350346812.

It is an arithmetic number, because the mean of its divisors is an integer number (628350346812).

Almost surely, 2^{1256700693623} is an apocalyptic number.

1256700693623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256700693623 is an equidigital number, since it uses as much as digits as its factorization.

1256700693623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 1256700693623 in words is "one trillion, two hundred fifty-six billion, seven hundred million, six hundred ninety-three thousand, six hundred twenty-three".