33531066461 has 4 divisors (see below), whose sum is σ = 33531434112. Its totient is φ = 33530698812.

The previous prime is 33531066433. The next prime is 33531066469. The reversal of 33531066461 is 16466013533.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 33531066461 - 2⁶ = 33531066397 is a prime.

It is a super-4 number, since 4×33531066461⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33531066469) 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, 67700 + ... + 267666.

It is an arithmetic number, because the mean of its divisors is an integer number (8382858528).

Almost surely, 2^33531066461 is an apocalyptic number.

It is an amenable number.

33531066461 is a deficient number, since it is larger than the sum of its proper divisors (367651).

33531066461 is a wasteful number, since it uses less digits than its factorization.

33531066461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367650.

The product of its (nonzero) digits is 116640, while the sum is 38.

Adding to 33531066461 its reverse (16466013533), we get a palindrome (49997079994).

The spelling of 33531066461 in words is "thirty-three billion, five hundred thirty-one million, sixty-six thousand, four hundred sixty-one".