61716501280 has 192 divisors, whose sum is σ = 172283811840. Its totient is φ = 20444774400.

The previous prime is 61716501263. The next prime is 61716501359. The reversal of 61716501280 is 8210561716.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 32670576 + ... + 32672464.

It is an arithmetic number, because the mean of its divisors is an integer number (897311520).

Almost surely, 2^61716501280 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 61716501280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86141905920).

61716501280 is an abundant number, since it is smaller than the sum of its proper divisors (110567310560).

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

61716501280 is a wasteful number, since it uses less digits than its factorization.

61716501280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883 (or 2875 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 61716501280 in words is "sixty-one billion, seven hundred sixteen million, five hundred one thousand, two hundred eighty".