255480731520 has 768 divisors, whose sum is σ = 984566016000. Its totient is φ = 56125440000.

The previous prime is 255480731509. The next prime is 255480731531. The reversal of 255480731520 is 25137084552.

It is an interprime number because it is at equal distance from previous prime (255480731509) and next prime (255480731531).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 732036306 + ... + 732036654.

It is an arithmetic number, because the mean of its divisors is an integer number (1281987000).

Almost surely, 2^255480731520 is an apocalyptic number.

255480731520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255480731520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492283008000).

255480731520 is an abundant number, since it is smaller than the sum of its proper divisors (729085284480).

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

255480731520 is a wasteful number, since it uses less digits than its factorization.

255480731520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 255480731520 in words is "two hundred fifty-five billion, four hundred eighty million, seven hundred thirty-one thousand, five hundred twenty".