61860928282920 has 512 divisors, whose sum is σ = 237714462720000. Its totient is φ = 14181358445568.

The previous prime is 61860928282889. The next prime is 61860928282921. The reversal of 61860928282920 is 2928282906816.

61860928282920 is a `hidden beast` number, since 6 + 1 + 8 + 60 + 9 + 282 + 8 + 292 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (61860928282921) 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, 13773609 + ... + 17704071.

It is an arithmetic number, because the mean of its divisors is an integer number (464286060000).

Almost surely, 2^{61860928282920} is an apocalyptic number.

61860928282920 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 61860928282920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118857231360000).

61860928282920 is an abundant number, since it is smaller than the sum of its proper divisors (175853534437080).

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

61860928282920 is a wasteful number, since it uses less digits than its factorization.

61860928282920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930574 (or 3930564 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 61860928282920 in words is "sixty-one trillion, eight hundred sixty billion, nine hundred twenty-eight million, two hundred eighty-two thousand, nine hundred twenty".