255981051801 has 12 divisors (see below), whose sum is σ = 370132789312. Its totient is φ = 170477550936.

The previous prime is 255981051761. The next prime is 255981051829. The reversal of 255981051801 is 108150189552.

It is a happy number.

255981051801 is a `hidden beast` number, since 2 + 5 + 59 + 81 + 0 + 518 + 0 + 1 = 666.

It is not a de Polignac number, because 255981051801 - 2⁶ = 255981051737 is a prime.

It is a super-2 number, since 2×255981051801² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255981051301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14697781 + ... + 14715186.

Almost surely, 2^255981051801 is an apocalyptic number.

It is an amenable number.

255981051801 is a deficient number, since it is larger than the sum of its proper divisors (114151737511).

255981051801 is a wasteful number, since it uses less digits than its factorization.

255981051801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29413940 (or 29413937 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 45.

The spelling of 255981051801 in words is "two hundred fifty-five billion, nine hundred eighty-one million, fifty-one thousand, eight hundred one".