61331492320 has 192 divisors, whose sum is σ = 175048473600. Its totient is φ = 19836887040.

The previous prime is 61331492303. The next prime is 61331492353. The reversal of 61331492320 is 2329413316.

It is a congruent number.

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, 5122501 + ... + 5134459.

It is an arithmetic number, because the mean of its divisors is an integer number (911710800).

Almost surely, 2^61331492320 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 61331492320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87524236800).

61331492320 is an abundant number, since it is smaller than the sum of its proper divisors (113716981280).

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

61331492320 is a wasteful number, since it uses less digits than its factorization.

61331492320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12241 (or 12233 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 61331492320 in words is "sixty-one billion, three hundred thirty-one million, four hundred ninety-two thousand, three hundred twenty".