281556013420 has 48 divisors (see below), whose sum is σ = 646412594688. Its totient is φ = 102162836160.

The previous prime is 281556013397. The next prime is 281556013483. The reversal of 281556013420 is 24310655182.

It is a self number, because there is not a number n which added to its sum of digits gives 281556013420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280214 + ... + 1483933.

It is an arithmetic number, because the mean of its divisors is an integer number (13466929056).

Almost surely, 2^281556013420 is an apocalyptic number.

281556013420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281556013420 is an abundant number, since it is smaller than the sum of its proper divisors (364856581268).

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

281556013420 is a wasteful number, since it uses less digits than its factorization.

281556013420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764630 (or 2764628 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 281556013420 in words is "two hundred eighty-one billion, five hundred fifty-six million, thirteen thousand, four hundred twenty".