61055433720 has 512 divisors, whose sum is σ = 226630656000. Its totient is φ = 14556672000.

The previous prime is 61055433671. The next prime is 61055433727. The reversal of 61055433720 is 2733455016.

61055433720 is a `hidden beast` number, since 6 + 1 + 0 + 554 + 33 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61055433727) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26079750 + ... + 26082090.

It is an arithmetic number, because the mean of its divisors is an integer number (442638000).

Almost surely, 2^61055433720 is an apocalyptic number.

61055433720 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 61055433720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113315328000).

61055433720 is an abundant number, since it is smaller than the sum of its proper divisors (165575222280).

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

61055433720 is a wasteful number, since it uses less digits than its factorization.

61055433720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452 (or 2442 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

Adding to 61055433720 its reverse (2733455016), we get a palindrome (63788888736).

The spelling of 61055433720 in words is "sixty-one billion, fifty-five million, four hundred thirty-three thousand, seven hundred twenty".