61020135633 has 8 divisors (see below), whose sum is σ = 82739167200. Its totient is φ = 39990597248.

The previous prime is 61020135629. The next prime is 61020135641. The reversal of 61020135633 is 33653102016.

It is a happy number.

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 61020135633 - 2² = 61020135629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61020135633.

It is not an unprimeable number, because it can be changed into a prime (61020135623) 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, 172373088 + ... + 172373441.

It is an arithmetic number, because the mean of its divisors is an integer number (10342395900).

Almost surely, 2^61020135633 is an apocalyptic number.

It is an amenable number.

61020135633 is a deficient number, since it is larger than the sum of its proper divisors (21719031567).

61020135633 is a wasteful number, since it uses less digits than its factorization.

61020135633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344746591.

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 61020135633 its reverse (33653102016), we get a palindrome (94673237649).

The spelling of 61020135633 in words is "sixty-one billion, twenty million, one hundred thirty-five thousand, six hundred thirty-three".