42342341645521 has 8 divisors (see below), whose sum is σ = 42381516965760. Its totient is φ = 42303181657152.

The previous prime is 42342341645503. The next prime is 42342341645551. The reversal of 42342341645521 is 12554614324324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42342341645521 - 2¹³ = 42342341637329 is a prime.

It is a super-2 number, since 2×42342341645521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42342341645551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1696716 + ... + 9357538.

It is an arithmetic number, because the mean of its divisors is an integer number (5297689620720).

Almost surely, 2^{42342341645521} is an apocalyptic number.

It is an amenable number.

42342341645521 is a deficient number, since it is larger than the sum of its proper divisors (39175320239).

42342341645521 is a wasteful number, since it uses less digits than its factorization.

42342341645521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7665935.

The product of its digits is 2764800, while the sum is 46.

Adding to 42342341645521 its reverse (12554614324324), we get a palindrome (54896955969845).

The spelling of 42342341645521 in words is "forty-two trillion, three hundred forty-two billion, three hundred forty-one million, six hundred forty-five thousand, five hundred twenty-one".