255527663893 has 2 divisors, whose sum is σ = 255527663894. Its totient is φ = 255527663892.

The previous prime is 255527663813. The next prime is 255527663921. The reversal of 255527663893 is 398366725552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242622249489 + 12905414404 = 492567^2 + 113602^2 .

It is a cyclic number.

It is not a de Polignac number, because 255527663893 - 2¹³ = 255527655701 is a prime.

It is a super-2 number, since 2×255527663893² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255527663803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127763831946 + 127763831947.

It is an arithmetic number, because the mean of its divisors is an integer number (127763831947).

Almost surely, 2^255527663893 is an apocalyptic number.

It is an amenable number.

255527663893 is a deficient number, since it is larger than the sum of its proper divisors (1).

255527663893 is an equidigital number, since it uses as much as digits as its factorization.

255527663893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648000, while the sum is 61.

The spelling of 255527663893 in words is "two hundred fifty-five billion, five hundred twenty-seven million, six hundred sixty-three thousand, eight hundred ninety-three".