255415142861 has 2 divisors, whose sum is σ = 255415142862. Its totient is φ = 255415142860.

The previous prime is 255415142833. The next prime is 255415142863. The reversal of 255415142861 is 168241514552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206825757961 + 48589384900 = 454781^2 + 220430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255415142861 is a prime.

Together with 255415142863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255415142863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127707571430 + 127707571431.

It is an arithmetic number, because the mean of its divisors is an integer number (127707571431).

Almost surely, 2^255415142861 is an apocalyptic number.

It is an amenable number.

255415142861 is a deficient number, since it is larger than the sum of its proper divisors (1).

255415142861 is an equidigital number, since it uses as much as digits as its factorization.

255415142861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384000, while the sum is 44.

The spelling of 255415142861 in words is "two hundred fifty-five billion, four hundred fifteen million, one hundred forty-two thousand, eight hundred sixty-one".