61233115218 has 64 divisors (see below), whose sum is σ = 141552437760. Its totient is φ = 17452371200.

The previous prime is 61233115157. The next prime is 61233115271. The reversal of 61233115218 is 81251133216.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1745293 + ... + 1780031.

It is an arithmetic number, because the mean of its divisors is an integer number (2211756840).

Almost surely, 2^61233115218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61233115218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70776218880).

61233115218 is an abundant number, since it is smaller than the sum of its proper divisors (80319322542).

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

61233115218 is a wasteful number, since it uses less digits than its factorization.

61233115218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36343.

The product of its digits is 8640, while the sum is 33.

The spelling of 61233115218 in words is "sixty-one billion, two hundred thirty-three million, one hundred fifteen thousand, two hundred eighteen".