42000015643 has 4 divisors (see below), whose sum is σ = 42000428448. Its totient is φ = 41999602840.

The previous prime is 42000015587. The next prime is 42000015647. The reversal of 42000015643 is 34651000024.

42000015643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42000015643 - 2²⁵ = 41966461211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42000015647) 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, 66405 + ... + 297337.

It is an arithmetic number, because the mean of its divisors is an integer number (10500107112).

Almost surely, 2^42000015643 is an apocalyptic number.

42000015643 is a deficient number, since it is larger than the sum of its proper divisors (412805).

42000015643 is a wasteful number, since it uses less digits than its factorization.

42000015643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412804.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 42000015643 its reverse (34651000024), we get a palindrome (76651015667).

The spelling of 42000015643 in words is "forty-two billion, fifteen thousand, six hundred forty-three".