255061561545 has 96 divisors (see below), whose sum is σ = 516638932992. Its totient is φ = 113980784256.

The previous prime is 255061561441. The next prime is 255061561549. The reversal of 255061561545 is 545165160552.

It is a happy number.

255061561545 is a `hidden beast` number, since 2 + 5 + 50 + 6 + 1 + 56 + 1 + 545 = 666.

255061561545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 255061561545 - 2⁹ = 255061561033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 255061561545.

It is not an unprimeable number, because it can be changed into a prime (255061561549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12766734 + ... + 12786696.

It is an arithmetic number, because the mean of its divisors is an integer number (5381655552).

Almost surely, 2^255061561545 is an apocalyptic number.

It is an amenable number.

255061561545 is an abundant number, since it is smaller than the sum of its proper divisors (261577371447).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255061561545 is a wasteful number, since it uses less digits than its factorization.

255061561545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891 (or 20888 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The spelling of 255061561545 in words is "two hundred fifty-five billion, sixty-one million, five hundred sixty-one thousand, five hundred forty-five".