42781435073 has 8 divisors (see below), whose sum is σ = 46086201000. Its totient is φ = 39478652928.

The previous prime is 42781435049. The next prime is 42781435093. The reversal of 42781435073 is 37053418724.

It can be written as a sum of positive squares in 4 ways, for example, as 9275230864 + 33506204209 = 96308^2 + 183047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42781435073 - 2¹⁰ = 42781434049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42781435093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450998 + ... + 537551.

It is an arithmetic number, because the mean of its divisors is an integer number (5760775125).

Almost surely, 2^42781435073 is an apocalyptic number.

It is an amenable number.

42781435073 is a deficient number, since it is larger than the sum of its proper divisors (3304765927).

42781435073 is a wasteful number, since it uses less digits than its factorization.

42781435073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991891.

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 42781435073 in words is "forty-two billion, seven hundred eighty-one million, four hundred thirty-five thousand, seventy-three".