42678298391 has 4 divisors (see below), whose sum is σ = 42933857232. Its totient is φ = 42422739552.

The previous prime is 42678298373. The next prime is 42678298433. The reversal of 42678298391 is 19389287624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42678298391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42678298391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42678298321) 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, 127779170 + ... + 127779503.

It is an arithmetic number, because the mean of its divisors is an integer number (10733464308).

Almost surely, 2^42678298391 is an apocalyptic number.

42678298391 is a deficient number, since it is larger than the sum of its proper divisors (255558841).

42678298391 is a wasteful number, since it uses less digits than its factorization.

42678298391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255558840.

The product of its digits is 10450944, while the sum is 59.

The spelling of 42678298391 in words is "forty-two billion, six hundred seventy-eight million, two hundred ninety-eight thousand, three hundred ninety-one".