42521606435 has 24 divisors (see below), whose sum is σ = 64098692448. Its totient is φ = 26506972800.

The previous prime is 42521606419. The next prime is 42521606443. The reversal of 42521606435 is 53460612524.

It is not a de Polignac number, because 42521606435 - 2⁴ = 42521606419 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5016026 + ... + 5024495.

It is an arithmetic number, because the mean of its divisors is an integer number (2670778852).

Almost surely, 2^42521606435 is an apocalyptic number.

42521606435 is a deficient number, since it is larger than the sum of its proper divisors (21577086013).

42521606435 is a wasteful number, since it uses less digits than its factorization.

42521606435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040555 (or 10040544 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 42521606435 in words is "forty-two billion, five hundred twenty-one million, six hundred six thousand, four hundred thirty-five".