255664120434554 has 64 divisors (see below), whose sum is σ = 418051528659072. Its totient is φ = 116562766694400.

The previous prime is 255664120434529. The next prime is 255664120434631. The reversal of 255664120434554 is 455434021466552.

It is a super-4 number, since 4×255664120434554⁴ (a number of 59 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 255664120434554.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5289177074 + ... + 5289225410.

It is an arithmetic number, because the mean of its divisors is an integer number (6532055135298).

Almost surely, 2^{255664120434554} is an apocalyptic number.

255664120434554 is a deficient number, since it is larger than the sum of its proper divisors (162387408224518).

255664120434554 is a wasteful number, since it uses less digits than its factorization.

255664120434554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55551.

The product of its (nonzero) digits is 69120000, while the sum is 56.

The spelling of 255664120434554 in words is "two hundred fifty-five trillion, six hundred sixty-four billion, one hundred twenty million, four hundred thirty-four thousand, five hundred fifty-four".