42139026291 has 8 divisors (see below), whose sum is σ = 59142493120. Its totient is φ = 26614121832.

The previous prime is 42139026283. The next prime is 42139026313. The reversal of 42139026291 is 19262093124.

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

It is not a de Polignac number, because 42139026291 - 2³ = 42139026283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42139026191) 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, 369640525 + ... + 369640638.

It is an arithmetic number, because the mean of its divisors is an integer number (7392811640).

Almost surely, 2^42139026291 is an apocalyptic number.

42139026291 is a deficient number, since it is larger than the sum of its proper divisors (17003466829).

42139026291 is a wasteful number, since it uses less digits than its factorization.

42139026291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739281185.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 42139026291 in words is "forty-two billion, one hundred thirty-nine million, twenty-six thousand, two hundred ninety-one".