255970402124891 has 2 divisors, whose sum is σ = 255970402124892. Its totient is φ = 255970402124890.

The previous prime is 255970402124849. The next prime is 255970402124923. The reversal of 255970402124891 is 198421204079552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255970402124891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255970402124891.

It is not a weakly prime, because it can be changed into another prime (255970402124821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127985201062445 + 127985201062446.

It is an arithmetic number, because the mean of its divisors is an integer number (127985201062446).

Almost surely, 2^{255970402124891} is an apocalyptic number.

255970402124891 is a deficient number, since it is larger than the sum of its proper divisors (1).

255970402124891 is an equidigital number, since it uses as much as digits as its factorization.

255970402124891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 255970402124891 in words is "two hundred fifty-five trillion, nine hundred seventy billion, four hundred two million, one hundred twenty-four thousand, eight hundred ninety-one".