255720545964 has 96 divisors (see below), whose sum is σ = 714764897280. Its totient is φ = 78596481600.

The previous prime is 255720545947. The next prime is 255720545981. The reversal of 255720545964 is 469545027552.

255720545964 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 2 + 0 + 545 + 96 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (255720545947) and next prime (255720545981).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 255720545964.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1179079 + ... + 1379009.

It is an arithmetic number, because the mean of its divisors is an integer number (7445467680).

Almost surely, 2^255720545964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255720545964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357382448640).

255720545964 is an abundant number, since it is smaller than the sum of its proper divisors (459044351316).

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

255720545964 is a wasteful number, since it uses less digits than its factorization.

255720545964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200868 (or 200860 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 54.

The spelling of 255720545964 in words is "two hundred fifty-five billion, seven hundred twenty million, five hundred forty-five thousand, nine hundred sixty-four".