281616428432 has 20 divisors (see below), whose sum is σ = 545644724940. Its totient is φ = 140804886528.

The previous prime is 281616428407. The next prime is 281616428459. The reversal of 281616428432 is 234824616182.

It can be written as a sum of positive squares in 2 ways, for example, as 112544146576 + 169072281856 = 335476^2 + 411184^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580868 + ... + 949020.

It is an arithmetic number, because the mean of its divisors is an integer number (27282236247).

Almost surely, 2^281616428432 is an apocalyptic number.

It is an amenable number.

281616428432 is a deficient number, since it is larger than the sum of its proper divisors (264028296508).

281616428432 is a wasteful number, since it uses less digits than its factorization.

281616428432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415970 (or 415964 counting only the distinct ones).

The product of its digits is 884736, while the sum is 47.

The spelling of 281616428432 in words is "two hundred eighty-one billion, six hundred sixteen million, four hundred twenty-eight thousand, four hundred thirty-two".