42263426643391 has 4 divisors (see below), whose sum is σ = 42263614615000. Its totient is φ = 42263238671784.

The previous prime is 42263426643341. The next prime is 42263426643397. The reversal of 42263426643391 is 19334662436224.

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

It is a cyclic number.

It is not a de Polignac number, because 42263426643391 - 2³⁹ = 41713670829503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42263426643397) 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, 93648141 + ... + 94098358.

It is an arithmetic number, because the mean of its divisors is an integer number (10565903653750).

Almost surely, 2^{42263426643391} is an apocalyptic number.

42263426643391 is a deficient number, since it is larger than the sum of its proper divisors (187971609).

42263426643391 is a wasteful number, since it uses less digits than its factorization.

42263426643391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187971608.

The product of its digits is 26873856, while the sum is 55.

The spelling of 42263426643391 in words is "forty-two trillion, two hundred sixty-three billion, four hundred twenty-six million, six hundred forty-three thousand, three hundred ninety-one".