42436189391 has 8 divisors (see below), whose sum is σ = 43059481968. Its totient is φ = 41816880000.

The previous prime is 42436189349. The next prime is 42436189421. The reversal of 42436189391 is 19398163424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42436189391 is a prime.

It is a super-3 number, since 3×42436189391³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42436185391) 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, 974330 + ... + 1016951.

It is an arithmetic number, because the mean of its divisors is an integer number (5382435246).

Almost surely, 2^42436189391 is an apocalyptic number.

42436189391 is a deficient number, since it is larger than the sum of its proper divisors (623292577).

42436189391 is a wasteful number, since it uses less digits than its factorization.

42436189391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991593.

The product of its digits is 1119744, while the sum is 50.

The spelling of 42436189391 in words is "forty-two billion, four hundred thirty-six million, one hundred eighty-nine thousand, three hundred ninety-one".