61155300000 has 288 divisors, whose sum is σ = 211233355200. Its totient is φ = 15448320000.

The previous prime is 61155299999. The next prime is 61155300007. The reversal of 61155300000 is 355116.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61155300000.

It is not an unprimeable number, because it can be changed into a prime (61155300007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5694636 + ... + 5705364.

It is an arithmetic number, because the mean of its divisors is an integer number (733449150).

Almost surely, 2^61155300000 is an apocalyptic number.

61155300000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61155300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105616677600).

61155300000 is an abundant number, since it is smaller than the sum of its proper divisors (150078055200).

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

61155300000 is a wasteful number, since it uses less digits than its factorization.

61155300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10786 (or 10758 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 61155300000 its reverse (355116), we get a palindrome (61155655116).

The spelling of 61155300000 in words is "sixty-one billion, one hundred fifty-five million, three hundred thousand".