255492843840 has 1008 divisors, whose sum is σ = 1017976063104. Its totient is φ = 60630405120.

The previous prime is 255492843773. The next prime is 255492843847. The reversal of 255492843840 is 48348294552.

255492843840 is a `hidden beast` number, since 2 + 5 + 5 + 492 + 84 + 38 + 40 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255492843847) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 971455549 + ... + 971455811.

It is an arithmetic number, because the mean of its divisors is an integer number (1009896888).

Almost surely, 2^255492843840 is an apocalyptic number.

255492843840 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 255492843840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508988031552).

255492843840 is an abundant number, since it is smaller than the sum of its proper divisors (762483219264).

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

255492843840 is a wasteful number, since it uses less digits than its factorization.

255492843840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 54.

The spelling of 255492843840 in words is "two hundred fifty-five billion, four hundred ninety-two million, eight hundred forty-three thousand, eight hundred forty".