255778534780 has 24 divisors (see below), whose sum is σ = 560488616352. Its totient is φ = 97863091392.

The previous prime is 255778534741. The next prime is 255778534819. The reversal of 255778534780 is 87435877552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (255778534741) and next prime (255778534819).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 278019687 + ... + 278020606.

It is an arithmetic number, because the mean of its divisors is an integer number (23353692348).

Almost surely, 2^255778534780 is an apocalyptic number.

255778534780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255778534780 is an abundant number, since it is smaller than the sum of its proper divisors (304710081572).

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

255778534780 is a wasteful number, since it uses less digits than its factorization.

255778534780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556040325 (or 556040323 counting only the distinct ones).

The product of its (nonzero) digits is 65856000, while the sum is 61.

The spelling of 255778534780 in words is "two hundred fifty-five billion, seven hundred seventy-eight million, five hundred thirty-four thousand, seven hundred eighty".