281440602456 has 128 divisors (see below), whose sum is σ = 770218848000. Its totient is φ = 85178377728.

The previous prime is 281440602449. The next prime is 281440602461. The reversal of 281440602456 is 654206044182.

It is a congruent number.

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, 5906455 + ... + 5953913.

It is an arithmetic number, because the mean of its divisors is an integer number (6017334750).

Almost surely, 2^281440602456 is an apocalyptic number.

281440602456 is a gapful number since it is divisible by the number (26) 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 281440602456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385109424000).

281440602456 is an abundant number, since it is smaller than the sum of its proper divisors (488778245544).

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

281440602456 is a wasteful number, since it uses less digits than its factorization.

281440602456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47793 (or 47789 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 281440602456 in words is "two hundred eighty-one billion, four hundred forty million, six hundred two thousand, four hundred fifty-six".