2556293565071 has 2 divisors, whose sum is σ = 2556293565072. Its totient is φ = 2556293565070.

The previous prime is 2556293564959. The next prime is 2556293565079. The reversal of 2556293565071 is 1705653926552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556293565071 is a prime.

It is a super-2 number, since 2×2556293565071² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2556293564998 and 2556293565016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556293565079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278146782535 + 1278146782536.

It is an arithmetic number, because the mean of its divisors is an integer number (1278146782536).

Almost surely, 2^{2556293565071} is an apocalyptic number.

2556293565071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556293565071 is an equidigital number, since it uses as much as digits as its factorization.

2556293565071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010000, while the sum is 56.

The spelling of 2556293565071 in words is "two trillion, five hundred fifty-six billion, two hundred ninety-three million, five hundred sixty-five thousand, seventy-one".