61807321360 has 80 divisors (see below), whose sum is σ = 149867407872. Its totient is φ = 23678668800.

The previous prime is 61807321337. The next prime is 61807321399. The reversal of 61807321360 is 6312370816.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112095 + ... + 369025.

Almost surely, 2^61807321360 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 61807321360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74933703936).

61807321360 is an abundant number, since it is smaller than the sum of its proper divisors (88060086512).

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

61807321360 is a wasteful number, since it uses less digits than its factorization.

61807321360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257072 (or 257066 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 61807321360 in words is "sixty-one billion, eight hundred seven million, three hundred twenty-one thousand, three hundred sixty".