255540848641 has 4 divisors (see below), whose sum is σ = 275197837012. Its totient is φ = 235883860272.

The previous prime is 255540848627. The next prime is 255540848681. The reversal of 255540848641 is 146848045552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78871105600 + 176669743041 = 280840^2 + 420321^2 .

It is a cyclic number.

It is not a de Polignac number, because 255540848641 - 2¹⁹ = 255540324353 is a prime.

It is a super-2 number, since 2×255540848641² (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 (255540848621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9828494166 + ... + 9828494191.

It is an arithmetic number, because the mean of its divisors is an integer number (68799459253).

Almost surely, 2^255540848641 is an apocalyptic number.

It is an amenable number.

255540848641 is a deficient number, since it is larger than the sum of its proper divisors (19656988371).

255540848641 is a wasteful number, since it uses less digits than its factorization.

255540848641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19656988370.

The product of its (nonzero) digits is 6144000, while the sum is 52.

The spelling of 255540848641 in words is "two hundred fifty-five billion, five hundred forty million, eight hundred forty-eight thousand, six hundred forty-one".