61045129320 has 512 divisors, whose sum is σ = 235003576320. Its totient is φ = 12361973760.

The previous prime is 61045129319. The next prime is 61045129349. The reversal of 61045129320 is 2392154016.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16377297 + ... + 16381023.

It is an arithmetic number, because the mean of its divisors is an integer number (458991360).

Almost surely, 2^61045129320 is an apocalyptic number.

61045129320 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 61045129320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117501788160).

61045129320 is an abundant number, since it is smaller than the sum of its proper divisors (173958447000).

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

61045129320 is a wasteful number, since it uses less digits than its factorization.

61045129320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833 (or 3829 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 61045129320 in words is "sixty-one billion, forty-five million, one hundred twenty-nine thousand, three hundred twenty".