61285533320 has 128 divisors (see below), whose sum is σ = 151468237440. Its totient is φ = 22132131840.

The previous prime is 61285533319. The next prime is 61285533343. The reversal of 61285533320 is 2333558216.

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, 69405599 + ... + 69406481.

It is an arithmetic number, because the mean of its divisors is an integer number (1183345605).

Almost surely, 2^61285533320 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 61285533320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75734118720).

61285533320 is an abundant number, since it is smaller than the sum of its proper divisors (90182704120).

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

61285533320 is a wasteful number, since it uses less digits than its factorization.

61285533320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815 (or 1811 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 61285533320 in words is "sixty-one billion, two hundred eighty-five million, five hundred thirty-three thousand, three hundred twenty".