42135653641 has 4 divisors (see below), whose sum is σ = 42457299984. Its totient is φ = 41814007300.

The previous prime is 42135653587. The next prime is 42135653653. The reversal of 42135653641 is 14635653124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42135653641 - 2¹³ = 42135645449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42135653594 and 42135653603.

It is not an unprimeable number, because it can be changed into a prime (42135633641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160822975 + ... + 160823236.

It is an arithmetic number, because the mean of its divisors is an integer number (10614324996).

Almost surely, 2^42135653641 is an apocalyptic number.

It is an amenable number.

42135653641 is a deficient number, since it is larger than the sum of its proper divisors (321646343).

42135653641 is a wasteful number, since it uses less digits than its factorization.

42135653641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321646342.

The product of its digits is 259200, while the sum is 40.

The spelling of 42135653641 in words is "forty-two billion, one hundred thirty-five million, six hundred fifty-three thousand, six hundred forty-one".