255531610620 has 288 divisors, whose sum is σ = 912211844544. Its totient is φ = 57082060800.

The previous prime is 255531610619. The next prime is 255531610637. The reversal of 255531610620 is 26016135552.

255531610620 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 3 + 16 + 10 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 15255450 + ... + 15272190.

It is an arithmetic number, because the mean of its divisors is an integer number (3167402238).

Almost surely, 2^255531610620 is an apocalyptic number.

255531610620 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 255531610620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456105922272).

255531610620 is an abundant number, since it is smaller than the sum of its proper divisors (656680233924).

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

255531610620 is a wasteful number, since it uses less digits than its factorization.

255531610620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17373 (or 17368 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 255531610620 in words is "two hundred fifty-five billion, five hundred thirty-one million, six hundred ten thousand, six hundred twenty".