255342791987 has 2 divisors, whose sum is σ = 255342791988. Its totient is φ = 255342791986.

The previous prime is 255342791971. The next prime is 255342792013. The reversal of 255342791987 is 789197243552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255342791987 - 2⁴ = 255342791971 is a prime.

It is a super-3 number, since 3×255342791987³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (255342791087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127671395993 + 127671395994.

It is an arithmetic number, because the mean of its divisors is an integer number (127671395994).

Almost surely, 2^255342791987 is an apocalyptic number.

255342791987 is a deficient number, since it is larger than the sum of its proper divisors (1).

255342791987 is an equidigital number, since it uses as much as digits as its factorization.

255342791987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38102400, while the sum is 62.

The spelling of 255342791987 in words is "two hundred fifty-five billion, three hundred forty-two million, seven hundred ninety-one thousand, nine hundred eighty-seven".