61999260576 has 192 divisors, whose sum is σ = 188439229440. Its totient is φ = 17639976960.

The previous prime is 61999260571. The next prime is 61999260577. The reversal of 61999260576 is 67506299916.

It is not an unprimeable number, because it can be changed into a prime (61999260571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7876995 + ... + 7884861.

It is an arithmetic number, because the mean of its divisors is an integer number (981454320).

Almost surely, 2^61999260576 is an apocalyptic number.

61999260576 is a gapful number since it is divisible by the number (66) 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 61999260576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94219614720).

61999260576 is an abundant number, since it is smaller than the sum of its proper divisors (126439968864).

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

61999260576 is a wasteful number, since it uses less digits than its factorization.

61999260576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8347 (or 8339 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 60.

The spelling of 61999260576 in words is "sixty-one billion, nine hundred ninety-nine million, two hundred sixty thousand, five hundred seventy-six".