281925123480 has 640 divisors, whose sum is σ = 1272292116480. Its totient is φ = 54074926080.

The previous prime is 281925123397. The next prime is 281925123511. The reversal of 281925123480 is 84321529182.

281925123480 is a `hidden beast` number, since 2 + 8 + 1 + 92 + 512 + 3 + 48 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3199777 + ... + 3286703.

It is an arithmetic number, because the mean of its divisors is an integer number (1987956432).

Almost surely, 2^281925123480 is an apocalyptic number.

281925123480 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 281925123480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636146058240).

281925123480 is an abundant number, since it is smaller than the sum of its proper divisors (990366993000).

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

281925123480 is a wasteful number, since it uses less digits than its factorization.

281925123480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86981 (or 86968 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 281925123480 in words is "two hundred eighty-one billion, nine hundred twenty-five million, one hundred twenty-three thousand, four hundred eighty".