281442779989 has 4 divisors (see below), whose sum is σ = 321648891424. Its totient is φ = 241236668556.

The previous prime is 281442779983. The next prime is 281442779993. The reversal of 281442779989 is 989977244182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 281442779989 - 2³⁷ = 144003826517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281442779983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20103055707 + ... + 20103055720.

It is an arithmetic number, because the mean of its divisors is an integer number (80412222856).

Almost surely, 2^281442779989 is an apocalyptic number.

It is an amenable number.

281442779989 is a deficient number, since it is larger than the sum of its proper divisors (40206111435).

281442779989 is an equidigital number, since it uses as much as digits as its factorization.

281442779989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40206111434.

The product of its digits is 146313216, while the sum is 70.

The spelling of 281442779989 in words is "two hundred eighty-one billion, four hundred forty-two million, seven hundred seventy-nine thousand, nine hundred eighty-nine".