61215901120 has 224 divisors, whose sum is σ = 168879292416. Its totient is φ = 20888371200.

The previous prime is 61215901093. The next prime is 61215901121. The reversal of 61215901120 is 2110951216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61215901121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22917385 + ... + 22920055.

Almost surely, 2^61215901120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61215901120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84439646208).

61215901120 is an abundant number, since it is smaller than the sum of its proper divisors (107663391296).

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

61215901120 is a wasteful number, since it uses less digits than its factorization.

61215901120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099 (or 3089 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 61215901120 in words is "sixty-one billion, two hundred fifteen million, nine hundred one thousand, one hundred twenty".