255728732766 has 32 divisors (see below), whose sum is σ = 550958352000. Its totient is φ = 78663191904.

The previous prime is 255728732747. The next prime is 255728732887. The reversal of 255728732766 is 667237827552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195580 + ... + 741423.

It is an arithmetic number, because the mean of its divisors is an integer number (17217448500).

Almost surely, 2^255728732766 is an apocalyptic number.

255728732766 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

255728732766 is an abundant number, since it is smaller than the sum of its proper divisors (295229619234).

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

255728732766 is a wasteful number, since it uses less digits than its factorization.

255728732766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940520.

The product of its digits is 59270400, while the sum is 60.

The spelling of 255728732766 in words is "two hundred fifty-five billion, seven hundred twenty-eight million, seven hundred thirty-two thousand, seven hundred sixty-six".