61020135330 has 128 divisors (see below), whose sum is σ = 192194795520. Its totient is φ = 12012157440.

The previous prime is 61020135287. The next prime is 61020135343. The reversal of 61020135330 is 3353102016.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61020135330.

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 63 ways as a sum of consecutive naturals, for example, 651259 + ... + 739038.

It is an arithmetic number, because the mean of its divisors is an integer number (1501521840).

Almost surely, 2^61020135330 is an apocalyptic number.

61020135330 is an abundant number, since it is smaller than the sum of its proper divisors (131174660190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61020135330 is a wasteful number, since it uses less digits than its factorization.

61020135330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390344.

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 61020135330 its reverse (3353102016), we get a palindrome (64373237346).

The spelling of 61020135330 in words is "sixty-one billion, twenty million, one hundred thirty-five thousand, three hundred thirty".