42126603647 has 4 divisors (see below), whose sum is σ = 42153284520. Its totient is φ = 42099922776.

The previous prime is 42126603643. The next prime is 42126603661. The reversal of 42126603647 is 74630662124.

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 42126603647 - 2² = 42126603643 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 (42126603643) 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, 13338068 + ... + 13341225.

It is an arithmetic number, because the mean of its divisors is an integer number (10538321130).

Almost surely, 2^42126603647 is an apocalyptic number.

42126603647 is a deficient number, since it is larger than the sum of its proper divisors (26680873).

42126603647 is a wasteful number, since it uses less digits than its factorization.

42126603647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26680872.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 42126603647 in words is "forty-two billion, one hundred twenty-six million, six hundred three thousand, six hundred forty-seven".