1056256957939 has 2 divisors, whose sum is σ = 1056256957940. Its totient is φ = 1056256957938.

The previous prime is 1056256957937. The next prime is 1056256957991. The reversal of 1056256957939 is 9397596526501.

It is a weak prime.

It is an emirp because it is prime and its reverse (9397596526501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1056256957939 - 2¹ = 1056256957937 is a prime.

It is a super-2 number, since 2×1056256957939² (a number of 25 digits) contains 22 as substring.

Together with 1056256957937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1056256957937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528128478969 + 528128478970.

It is an arithmetic number, because the mean of its divisors is an integer number (528128478970).

Almost surely, 2^{1056256957939} is an apocalyptic number.

1056256957939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056256957939 is an equidigital number, since it uses as much as digits as its factorization.

1056256957939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137781000, while the sum is 67.

The spelling of 1056256957939 in words is "one trillion, fifty-six billion, two hundred fifty-six million, nine hundred fifty-seven thousand, nine hundred thirty-nine".