281278138156 has 6 divisors (see below), whose sum is σ = 492236741780. Its totient is φ = 140639069076.

The previous prime is 281278138151. The next prime is 281278138181. The reversal of 281278138156 is 651831872182.

It is not an unprimeable number, because it can be changed into a prime (281278138151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35159767266 + ... + 35159767273.

Almost surely, 2^281278138156 is an apocalyptic number.

It is an amenable number.

281278138156 is a deficient number, since it is larger than the sum of its proper divisors (210958603624).

281278138156 is a wasteful number, since it uses less digits than its factorization.

281278138156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70319534543 (or 70319534541 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 52.

The spelling of 281278138156 in words is "two hundred eighty-one billion, two hundred seventy-eight million, one hundred thirty-eight thousand, one hundred fifty-six".