61334689520 has 80 divisors (see below), whose sum is σ = 153802572672. Its totient is φ = 22612746240.

The previous prime is 61334689511. The next prime is 61334689523. The reversal of 61334689520 is 2598643316.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61334689523) 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 15 ways as a sum of consecutive naturals, for example, 656105 + ... + 743735.

Almost surely, 2^61334689520 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 61334689520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76901286336).

61334689520 is an abundant number, since it is smaller than the sum of its proper divisors (92467883152).

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

61334689520 is a wasteful number, since it uses less digits than its factorization.

61334689520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88330 (or 88324 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 61334689520 in words is "sixty-one billion, three hundred thirty-four million, six hundred eighty-nine thousand, five hundred twenty".