42138660794 has 8 divisors (see below), whose sum is σ = 63247328928. Its totient is φ = 21056217820.

The previous prime is 42138660793. The next prime is 42138660799. The reversal of 42138660794 is 49706683124.

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

It is not an unprimeable number, because it can be changed into a prime (42138660793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6552272 + ... + 6558699.

It is an arithmetic number, because the mean of its divisors is an integer number (7905916116).

Almost surely, 2^42138660794 is an apocalyptic number.

42138660794 is a deficient number, since it is larger than the sum of its proper divisors (21108668134).

42138660794 is a wasteful number, since it uses less digits than its factorization.

42138660794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13112580.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 42138660794 in words is "forty-two billion, one hundred thirty-eight million, six hundred sixty thousand, seven hundred ninety-four".