42104211645643 has 4 divisors (see below), whose sum is σ = 48119099023600. Its totient is φ = 36089324267688.

The previous prime is 42104211645611. The next prime is 42104211645653. The reversal of 42104211645643 is 34654611240124.

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 42104211645643 - 2⁵ = 42104211645611 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 42104211645643.

It is not an unprimeable number, because it can be changed into a prime (42104211645653) 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, 3007443688968 + ... + 3007443688981.

It is an arithmetic number, because the mean of its divisors is an integer number (12029774755900).

Almost surely, 2^{42104211645643} is an apocalyptic number.

42104211645643 is a deficient number, since it is larger than the sum of its proper divisors (6014887377957).

42104211645643 is an equidigital number, since it uses as much as digits as its factorization.

42104211645643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014887377956.

The product of its (nonzero) digits is 552960, while the sum is 43.

Adding to 42104211645643 its reverse (34654611240124), we get a palindrome (76758822885767).

The spelling of 42104211645643 in words is "forty-two trillion, one hundred four billion, two hundred eleven million, six hundred forty-five thousand, six hundred forty-three".