42633350521 has 4 divisors (see below), whose sum is σ = 42697849444. Its totient is φ = 42568851600.

The previous prime is 42633350491. The next prime is 42633350527. The reversal of 42633350521 is 12505333624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12965010496 + 29668340025 = 113864^2 + 172245^2 .

It is a cyclic number.

It is not a de Polignac number, because 42633350521 - 2¹⁹ = 42632826233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42633350527) 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, 32248470 + ... + 32249791.

It is an arithmetic number, because the mean of its divisors is an integer number (10674462361).

Almost surely, 2^42633350521 is an apocalyptic number.

It is an amenable number.

42633350521 is a deficient number, since it is larger than the sum of its proper divisors (64498923).

42633350521 is an equidigital number, since it uses as much as digits as its factorization.

42633350521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64498922.

The product of its (nonzero) digits is 64800, while the sum is 34.

The spelling of 42633350521 in words is "forty-two billion, six hundred thirty-three million, three hundred fifty thousand, five hundred twenty-one".