61161050000 has 120 divisors (see below), whose sum is σ = 151564799232. Its totient is φ = 23894640000.

The previous prime is 61161049997. The next prime is 61161050021. The reversal of 61161050000 is 5016116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2135777 + ... + 2164223.

Almost surely, 2^61161050000 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 61161050000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75782399616).

61161050000 is an abundant number, since it is smaller than the sum of its proper divisors (90403749232).

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

61161050000 is an equidigital number, since it uses as much as digits as its factorization.

61161050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28523 (or 28497 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 61161050000 its reverse (5016116), we get a palindrome (61166066116).

The spelling of 61161050000 in words is "sixty-one billion, one hundred sixty-one million, fifty thousand".