255658939969 has 2 divisors, whose sum is σ = 255658939970. Its totient is φ = 255658939968.

The previous prime is 255658939967. The next prime is 255658940029. The reversal of 255658939969 is 969939856552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194816304400 + 60842635569 = 441380^2 + 246663^2 .

It is a cyclic number.

It is not a de Polignac number, because 255658939969 - 2¹ = 255658939967 is a prime.

It is a super-2 number, since 2×255658939969² (a number of 24 digits) contains 22 as substring.

Together with 255658939967, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 255658939895 and 255658939904.

It is not a weakly prime, because it can be changed into another prime (255658939961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127829469984 + 127829469985.

It is an arithmetic number, because the mean of its divisors is an integer number (127829469985).

Almost surely, 2^255658939969 is an apocalyptic number.

It is an amenable number.

255658939969 is a deficient number, since it is larger than the sum of its proper divisors (1).

255658939969 is an equidigital number, since it uses as much as digits as its factorization.

255658939969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176000, while the sum is 76.

The spelling of 255658939969 in words is "two hundred fifty-five billion, six hundred fifty-eight million, nine hundred thirty-nine thousand, nine hundred sixty-nine".