42718780013 has 24 divisors (see below), whose sum is σ = 53989516728. Its totient is φ = 33500307456.

The previous prime is 42718779989. The next prime is 42718780057. The reversal of 42718780013 is 31008781724.

It can be written as a sum of positive squares in 4 ways, for example, as 1227941764 + 41490838249 = 35042^2 + 203693^2 .

It is not a de Polignac number, because 42718780013 - 2⁸ = 42718779757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42718780813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224756 + ... + 368717.

It is an arithmetic number, because the mean of its divisors is an integer number (2249563197).

Almost surely, 2^42718780013 is an apocalyptic number.

It is an amenable number.

42718780013 is a deficient number, since it is larger than the sum of its proper divisors (11270736715).

42718780013 is a wasteful number, since it uses less digits than its factorization.

42718780013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593613 (or 593606 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 42718780013 in words is "forty-two billion, seven hundred eighteen million, seven hundred eighty thousand, thirteen".