255540848639 has 8 divisors (see below), whose sum is σ = 261872906880. Its totient is φ = 249282849816.

The previous prime is 255540848627. The next prime is 255540848681. The reversal of 255540848639 is 936848045552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255540848639 - 2⁸ = 255540848383 is a prime.

It is a super-2 number, since 2×255540848639² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255540848039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18507869 + ... + 18521670.

It is an arithmetic number, because the mean of its divisors is an integer number (32734113360).

Almost surely, 2^255540848639 is an apocalyptic number.

255540848639 is a deficient number, since it is larger than the sum of its proper divisors (6332058241).

255540848639 is a wasteful number, since it uses less digits than its factorization.

255540848639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37029709.

The product of its (nonzero) digits is 41472000, while the sum is 59.

The spelling of 255540848639 in words is "two hundred fifty-five billion, five hundred forty million, eight hundred forty-eight thousand, six hundred thirty-nine".